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musical instrument details
Capi VP312DI API-style preamp with DI - 500 series
Estimated price for orientation: 470 $
Category: Preamps and Channel Strips
Class:
Description Condition: New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions- opens in a new window or tab ... Read moreabout the condition Brand: Capi Country/Region of Manufacture: United States Type: Preamp with DI Number of Channels: 1 Model: VP312DI
The VP312DI has the very same classic functions as the VP312 with a few very important exceptions:The microphone preamplifier circuit is exactly the same except for the addition of a high-quality Elna blocking cap after the DOA. This 470?F cap is also bypassed with a parallel Wima MKP .01?F cap (for those audiophile types!). I have found significant DC offset from the DOA depending upon which brand of DOA is being used, especially in Bo Mode. The Mute switch is not very quiet this way and we don't want to harm the 2503. For the die-hard vintage enthusiast, I have utilized a 3 position .1" 3M header and shunt so that these coupling caps can be fully bypassing. This will couple the DOA's output to the 2503's primaries for authentic, vintage 312 operation. A close up of this can be seen below. Next, we get into the DI information. This is quite extensive so take your time! First off, the Neutrik slim line jack is auto-switching. When a 1/4" plug is inserted, a relay on a Plug-In Relay PCB switches the source to the 1/4" jack's signal. Default DI mode or Pre 2622, utilizes a brand new concept developed by myself and Volker Mayer, aka [silent:arts]. We call it the . When in this mode, the Direct Inject signal takes the same path as a microphone. From the HiZ Plug-In thru the mic pad and then directly into the 2622 input transformer. This means the normal mic input pad will be available for use while in HiZ Plug-In mode, if required. This path thru the 2622 is very unique to a 312 style preamp. There is not another in the industry to my knowledge, not to mention the near endless possibilities with the HiZ Plug-In board. So far we have a few passive versions, an IC version and a FET version.I refer to the secondary or optional DI mode as Bo mode or Post 2622. For this I am utilizing the published circuit created by Bo Hansen. This Bo mode is not the same but is similar to the DI circuit found on the other popular 312 and 512 preamps. The selection for Bo mode and the related options are done via 3 NKK G-Series Ultra Miniature toggle switches. Flipping the top toggle switch to the right, activates a second Plug-In Relay circuit that couples the 1/4" jack signal to Bo's circuit and then directly into the discrete opamp, bypassing the 2622 input transformer. Without a 1/4" jack inserted, this relay cannot be activated. The second ultra mini toggle switch is for a -10dB pad of the DI signal. This pad switch is only active when a 1/4" jack is inserted and the above Post 2622 switch has been flipped to the right. So, no -10dB pad when in Pre 2622 mode but remember, in that situation the standard -20dB mic pad will still work. The bottom or third ultra mini toggle is only active if the above two switches have been flipped to the right. This switch creates a Low Pass Filter that mimics the "perfect Jaco Pastorius tone". It's another feature that helps make this preamp unique.
Description
| Condition: | New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details. See all condition definitions- opens in a new window or tab ... Read moreabout the condition | Brand: | Capi |
| Country/Region of Manufacture: | United States | Type: | Preamp with DI |
| Number of Channels: | 1 | Model: | VP312DI |
The VP312DI has the very same classic functions as the VP312 with a few very important exceptions:The microphone preamplifier circuit is exactly the same except for the addition of a high-quality Elna blocking cap after the DOA. This 470?F cap is also bypassed with a parallel Wima MKP .01?F cap (for those audiophile types!). I have found significant DC offset from the DOA depending upon which brand of DOA is being used, especially in Bo Mode. The Mute switch is not very quiet this way and we don't want to harm the 2503. For the die-hard vintage enthusiast, I have utilized a 3 position .1" 3M header and shunt so that these coupling caps can be fully bypassing. This will couple the DOA's output to the 2503's primaries for authentic, vintage 312 operation. A close up of this can be seen below. Next, we get into the DI information. This is quite extensive so take your time! First off, the Neutrik slim line jack is auto-switching. When a 1/4" plug is inserted, a relay on a Plug-In Relay PCB switches the source to the 1/4" jack's signal. Default DI mode or Pre 2622, utilizes a brand new concept developed by myself and Volker Mayer, aka [silent:arts]. We call it the . When in this mode, the Direct Inject signal takes the same path as a microphone. From the HiZ Plug-In thru the mic pad and then directly into the 2622 input transformer. This means the normal mic input pad will be available for use while in HiZ Plug-In mode, if required. This path thru the 2622 is very unique to a 312 style preamp. There is not another in the industry to my knowledge, not to mention the near endless possibilities with the HiZ Plug-In board. So far we have a few passive versions, an IC version and a FET version.I refer to the secondary or optional DI mode as Bo mode or Post 2622. For this I am utilizing the published circuit created by Bo Hansen. This Bo mode is not the same but is similar to the DI circuit found on the other popular 312 and 512 preamps. The selection for Bo mode and the related options are done via 3 NKK G-Series Ultra Miniature toggle switches. Flipping the top toggle switch to the right, activates a second Plug-In Relay circuit that couples the 1/4" jack signal to Bo's circuit and then directly into the discrete opamp, bypassing the 2622 input transformer. Without a 1/4" jack inserted, this relay cannot be activated. The second ultra mini toggle switch is for a -10dB pad of the DI signal. This pad switch is only active when a 1/4" jack is inserted and the above Post 2622 switch has been flipped to the right. So, no -10dB pad when in Pre 2622 mode but remember, in that situation the standard -20dB mic pad will still work. The bottom or third ultra mini toggle is only active if the above two switches have been flipped to the right. This switch creates a Low Pass Filter that mimics the "perfect Jaco Pastorius tone". It's another feature that helps make this preamp unique.