AudioNervosa
The Market => Manufacturer News => Topic started by: orchardaudio on June 29, 2019, 02:12:12 PM
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BOSC uses the latest in Gallium Nitride (GaN) technology to achieve high performance in a small form factor.
The low on resistance and low capacitance of the GaN FET enables high efficiency and lowers loop impedance for low Transient Intermodulation Distortion (T-IMD). The fast switching capability and zero reverse recovery charge enable higher output linearity and low cross over distortion for lower Total Harmonic Distortion (THD).
Preliminary Specifications:
- Gain: 16.8dB or 6.92
- Signal to Noise Ratio (SNR): ~120dB
- Total Harmonic Distortion (THD): <0.0006% (-105dB) @ 5W
- Frequency Response: DC - 40kHz
- Sensitivity: 2.5Vin for 37.5W into 8Ω
- Input Impedance: 5kΩ fully balanced
- Output Power: 100W into 8Ω w/ 48V Power Supply
- Output Power: 150W into 8Ω w/ 56V Power Supply
- Size: 5.5" (14cm) x 4.8" (12.2cm) x 1.9" (4.8cm)
Sign up to get updates and receive special early bird pricing on the amazing BOSC™ monoblock amp:
https://www.indiegogo.com/projects/bosc-hifi-monoblock-class-d-amp/coming_soon
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Well, you'll need a preamp with a hell of a lot of gain for that! Low for balanced is 20db, 26-32db is typical SE.
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Well, you'll need a preamp with a hell of a lot of gain for that! Low for balanced is 20db, 26-32db is typical SE.
If you have a PecanPi product no pre-amp needed.
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Preliminary THD vs Power Plot:
(https://www.audiosciencereview.com/forum/index.php?attachments/thd-ratio-vs-measured-level-png.27294/)
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If you are really interested in this product and would like to be one of the first people to get it at a reduced price, reserve now for $1. Only 55 spots available:
https://orchardaudio.com/shop?olsPage=products%2Fbsc-mplfr
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Full pricing information and updated specs available on my website here:
https://orchardaudio.com/bosc
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I am looking for people who would be interested in trying these amps and posting their findings.
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I am on the list and will be trying them with The Monoliths fully active speaker when I get them.
Comparison is to a pair of Parasound A23 amps on the planar drivers.
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I am looking for people who would be interested in trying these amps and posting their findings.
Leo, I'd definitely be interested, but not until I've got my PecanPi and I can borrow a pair of BOSC to test. So timing wise, it may not be ideal for you.
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I am looking for people who would be interested in trying these amps and posting their findings.
Leo, I'd definitely be interested, but not until I've got my PecanPi and I can borrow a pair of BOSC to test. So timing wise, it may not be ideal for you.
If everything goes according to plan I will be shipping your PecanPis before the end of the month. And then follow up with the amps sometime in the middle of August.
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For anybody interested, I have posted latest BOSC measurements here:
https://www.audiosciencereview.com/forum/index.php?threads/bosc-hifi-monoblock-class-d-amp.7750/post-210892
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An awesome review for the BOSC amp:
"Class-D amplifiers generally trigger reactions and opinions of a generic, mass-market sound. And I’ll admit, I tend to not be too curious about anything based around that amplification method. But Leonid (Leo) Ayzenshtat’s Class-D amplifiers continually force me to think differently. They prove that it isn’t about the type of thing, but rather about how skillfully a thing is made."*
"I wanted to stop my heart so I could hear the music better. I was being sucked in, pushed out, and unable to focus on anything else but the music. There were all the little bird-like chimes, dancing between clicks and pings and bongs of xylophone harmonics with dry reed raspy sounds zooming in and out, floating on top of deep rolling strings and organ-like bass. I didn’t want to miss a moment of it."*
Read the full review here:
https://theaudiobeatnik.com/reviewing-the-orchard-audio-bosc-monoblocks/
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Fascinating review Leo! I suspect many of us have a pre-determined perception of Class D amps although they certainly have improved since the early days. I'm really looking forward to having a chance to hear what your new amps can do soon.
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Leo you have come a long way since I spoke to you at our AuduiSyndrome meeting. It appears that the amps need the PecanPi as a system.
I like the concept of your amp however with only 5K Ohm input may be hard to match my preamp. What to do ?
charles
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Leo you have come a long way since I spoke to you at our AuduiSyndrome meeting. It appears that the amps need the PecanPi as a system.
I like the concept of your amp however with only 5K Ohm input may be hard to match my preamp. What to do ?
charles
What is the output impedance and output drive of your pre-amp?
BOSC was designed with the PecanPi in mind, that does not mean it will not work with other equipment. There is plenty of equipment out there that can drive 5k with no issues.
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I use a Lamm Reference preamp. I will check the manual.
charles
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I use a Lamm Reference preamp. I will check the manual.
charles
Based on what I found the output impedance is 130 ohm, this will have no issue driving 5k.
The PecanPi has 100ohm output impedance.
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Part 1 of another BOSC writeup:
https://theartofsound.net/forum/showthread.php?62737-Bigblog-The-Revolving-Door-of-HiFi-Auditioning&p=1114154#post1114154
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http://audioaddictsforum.com/thread/818/orchard-audios-class-amplifiers-review?page=1&scrollTo=23071
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Need to hear them with the Rethms and Fritz speakers.
charles
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I currently have a few review units going around around. If somebody wants to try them, send me an email to leo@orchardaudio.com.
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Hi,
where in your topic can I find prices for the preamp and amp. ?
I like the idea of a very small unit(s).
Also, where can I find pictures, including under the hood
if no military secret.
Thanks.
Guy 13
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Hi,
where in your topic can I find prices for the preamp and amp. ?
I like the idea of a very small unit(s).
Also, where can I find pictures, including under the hood
if no military secret.
Thanks.
Guy 13
All the prices, specs and pictures on the website:
www.orchardaudio.com
There is no preamp.
There is a streamer and a monoblock amp.
PecanPi Streamer -- 499
BOSC monoblock -- 1499 per pair
BOSC will be available at up to 33% off through Kickstarter which will start in early september.
The Streamer currently has a 15% off promotion, you get 15% refunded after you write a review.
BOSC electronics:
(https://lh3.googleusercontent.com/v3g7orfrAuduYnomVQ7BcwK9UtHyiDhAXn0eFX4tEzGtNHN8r9cWlhdAzoaMeXXHYt5uvTOdbI8K9vSQm9Q-ob2d9RyhikxrhusvGVGXaUGDwbhSvBboP_LT84z0G1jwzuImp3J6-A)
(https://lh3.googleusercontent.com/vhZYB9RMpAtvNtzlzCQpZmiUKek1FROxqYzriO0VNRF6VeDtVZMxYfmwYRxnNcFGa3TYKMi8OIysHr0sBgkUihwrZFidnWWK9p3oRiOAs6rNgv4GpMMboDFQd6Fm0SRG51Ml4QGPdg)
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I just had the good fortune to spend the last two weeks with Leo's BOSC amps and posted my take on them here:
https://www.audionervosa.com/index.php?topic=7264.0 (https://www.audionervosa.com/index.php?topic=7264.0)
In my opinion, these amps are something special and worth a listen!
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If you are in the NYC area come check out our equipment on September 21st.
https://www.facebook.com/events/404661903524664/
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Less than 2 weeks left!
(https://www.kicktraq.com/projects/orchardaudio/bosctm-hifi-monoblock-audio-amplifier/minichart.png) (https://www.kickstarter.com/projects/orchardaudio/bosctm-hifi-monoblock-audio-amplifier?ref=1hvtb6)
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BOSC quality...
Every BOSC amp is hand-assembled and tested in the USA, by yours truly.
The circuit board (PCB) uses a high-quality dielectric, has a gold finish (ENIG), and is assembled in Eatontown, NJ.
The components all come from high-end semiconductor manufacturers: Texas Instruments; Analog Devices; Murata; Panasonic; and NXP; to name a few.
The output filter inductors use oxygen-free copper (OFC) and are specifically made for Class-D amplifiers.
Even though Orchard Audio is new to the market, I have multiple patents and over a decade of experience in designing audio electronics.
I believe that you will be very happy with both the sound and quality of BOSC amplifiers.
Contact me with any questions!
https://www.kickstarter.com/projects/orchardaudio/bosctm-hifi-monoblock-audio-amplifier?ref=1hvtb6 (https://www.kickstarter.com/projects/orchardaudio/bosctm-hifi-monoblock-audio-amplifier?ref=1hvtb6)
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BOSC has reached 40 orders. The $999 price is available until November 5th. After that, the price will go to $1249.
Order here: https://orchardaudio.com/shop?olsPage=products%2Fbsc-mplfr
This is the last chance to get these amazing amplifiers at this price.
Manufacturing of the BOSC amps will kick off on November 6th. Deliveries will start taking place 8-12 weeks after that.
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Glad to see that these amps will finally go into production! :thumb:
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Hi all.
Glad to see the ending of the beginning.
Soon some people will enjoy real music reproduction.
Guy 13
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The BOSC amps made The Audio Beatnik's best of 2019 list:
https://bit.ly/2tt38Nd
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The BOSC amps made The Audio Beatnik's best of 2019 list:
https://bit.ly/2tt38Nd
CONGRATULATION !
Guy 13
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The BOSC amps made The Audio Beatnik's best of 2019 list:
https://bit.ly/2tt38Nd
👍 👍
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Awesome!
:thumb:
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Customers asked for it, here it is...BOSC amplifier with all connectors on the back.
Let me know what you think:
https://orchardaudio.com/bosc (https://orchardaudio.com/bosc)
(https://www.audiosciencereview.com/forum/index.php?attachments/img_1444-jpg.53363/)
(https://www.audiosciencereview.com/forum/index.php?attachments/img_1447-jpg.53364/)
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Looks good Leo!
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What Barry said :thumb:
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Looks good Leo!
What Barry said :thumb:
Thank you.
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Ron Nagle - Enjoy the Music
"The Orchard amplifiers at $1499.99 set a new benchmark for value, laser-like clarity, and inner detail at this price range. Highly recommended."
and
"Power on and my very first impression was clean and clear music overlapping what was a very dead black background."
http://www.enjoythemusic.com/magazine/equipment/0820/Orchard_Audio_BOSC_Starkrimson_ClassD_Monoblock_Amplifier_Review.htm
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Ron Nagle - Enjoy the Music
"The Orchard amplifiers at $1499.99 set a new benchmark for value, laser-like clarity, and inner detail at this price range. Highly recommended."
and
"Power on and my very first impression was clean and clear music overlapping what was a very dead black background."
http://www.enjoythemusic.com/magazine/equipment/0820/Orchard_Audio_BOSC_Starkrimson_ClassD_Monoblock_Amplifier_Review.htm
Congratulations, Leo :thumb: Nice that you also offer 2 versions per the review.
Nick
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They are great sounding amps. :D
Powering the open baffle planars in my speaker setup in biamp.
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Congrats on the positive review!
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Congrats Leo.
charles
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Use this code to get 10% off.
"lbrdy10%"
www.orchardaudio.com
Sale is valid till September 7th 2020
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Congratulations!!! :thumb:
https://www.theabsolutesound.com/articles/2021-product-of-the-year-awards-amplifier-of-the-year-awards
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Congratulations!!! :thumb:
https://www.theabsolutesound.com/articles/2021-product-of-the-year-awards-amplifier-of-the-year-awards
Thank you.
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Outstanding news!
Way to go Leo. :thumb:
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Congratulations, Leo :thumb:
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Wow! Great work. It is wonderful to get recognized for your labor on love, isn't it? I feel you.
Again: awesome! :thumb:
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Great job, Leo! Congrats! :thumb:
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For those that my be interested my article in Compound Semiconductor:
https://issuu.com/angelbusiness/docs/compound_semiconductor_issue_2_2022_lr/28
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For those that my be interested my article in Compound Semiconductor:
https://issuu.com/angelbusiness/docs/compound_semiconductor_issue_2_2022_lr/28
Excellent article! Great job with a VERY nice review at the end.
:thumb: