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Modifications


Tascam DR-680

$
300.00 for 6 channels
This modification provides much better detail and natural sound than the stock unit. All of the njm4580 op amps are changed out for high speed, extremly low noise op amps. The input capacitors are changed out for better values that allow for great bass response with an open sound and smooth high end that has excellent detail. This modification lowers the noise floor in the high gain setting by over -8db. The modifications will work very well in a huge variety of applications including nature recording, film, and music. I offer new units with all 6 channels modified for $900..
These come with a 2 year warranty on my modifications.
6 channels = $300
4 channels = $225
2 channels = $175

Buy a DR680 with the full 6 channel modification here.
Now just $900 plus shipping

Korg MR-1000
Transparency modification with ouput mods to match inputs $250.00 usd

The Korg MR1000 modification is to provide the ultimate in pure signal transfer from the source. Coupled with the DSD format of the recorder this is a great tool for mastering to two track as well as field recording. The op amps and capacitors are changed for much better quality components chosen for clarity, depth and speed to capture your source just as it is. The output stage mod is made to allow matched output to the inputs so your monitoring will better represent what the recorder is capturing. The headphone outputs are upgraded with the output mod.

Korg MR2000s
$
250.00 USD
The MR2000s is a great high fidelity recorder that with my modifications can be one of the ultimate audio recording tools available. this is an extensive modification that changes all of the jrc4580 op amps for my personally tested high speed low nosie op amps. I change all of the capacitors in the input path along with using high end bypass caps. The sound is just about a perfect and true to the source as I have ever heard with no high end smear. It's a real joy to listen to recordings through the MR2000s. These now have the ability to link more than one unit for multi channel DSD recording also.

Edirol R4
4 channels Vintage and/or Transparency $
250.00 USD
All op amps are changed in the input path along with the input capacitors. Resistors are changed to give a better gain stage for microphone inputs. The purpose of this modification is to open up the sound for a better soundstage. The transparency modification gives excellent transient response which translates to better detail throughout the audio frequencies. Bass has tighter definition the midrange is more natural and open and the high end is clean and detailed without harshness. the noise floor is lowered due to the resistor change and the low noise of the new op amps.

The Vintage modification provides a warmer tone with enhanced low to low midrange frequency response while still giving great high end detail and high mids that are natural.

Edirol R4pro
4 channels Vintage and Transparency $
250.00 USD
All op amps are changed in the input path along with the input capacitors. Resistors are changed to give a better gain stage for microphone inputs. The purpose of this modification is to open up the sound for a better soundstage. The transparency modification gives excellent transient response which translates to better detail throughout the audio frequencies. Bass has tighter definition the midrange is more natural and open and the high end is clean and detailed without harshness. the noise floor is lowered due to the resistor change and the low noise of the new op amps.

The Vintage modification provides a warmer tone with enhanced low to low midrange frequency response while still giving great high end detail and high mids that are natural.

Edirol R-44
4 channels of transparency modifications $
250.00 USD

Fostex FR2-LE
Vintage or Transparency $175.00 USD

Tascam HD-P2
Transparency $175.00 USD

Marantz PMD-670
Transparency $175.00 USD

Marantz PMD-671
Transparency $175.00 USD

Edirol UA-5
$160.00 USD
The one that started it all for Busman Audio. Improvements are huge with this upgrade, bringing better detail and soundstage to this interface. This modification has been compared to some of the better portable pre amps on the market. This modification changes the op amps and capacitors in the input path including the RCA inputs. The capacitors for the power supply and phantom power are also upgraded to give the user the best quality this interface can offer.