Boscoe MMSR77 kit – Classic Music Man StingRay Bass 2-band Preamp Replica – The Bus Mods – Omsi 2 Mods

Boscoe MMSR77 kit - Classic Music Man StingRay Bass 2-band Preamp Replica

$139.99 Buy It Now or Best Offer
free,30-Day Returns

Seller Store -boscoe-
(23) 100.0%,

Location: Lenexa, Kansas
Ships to: US,
Item: 226425026058

All returns accepted:ReturnsNotAccepted
MPN:MMSR77_v2_kit
Position:Onboard Preamp
To Fit:Bass Guitar
Active/Passive:Active
Unit Quantity:1
Boscoe Music:Boscoe Music
Type:Preamp Pickup

PREAMP-ONLY ALSO AVAILABLE! If you’re looking for just the preamp, please see my other listing here: https://www.ebay.com/itm/226047833560Overview:This is a reproduction of the classic late 1970s Pre-Ernie Ball Music Man StingRay 2-band preamp and includes the potentiometers, battery clip, audio jack, and wiring. Unlike all of the other reproductions I’ve managed to find online, this one is made with modern manufacturing methods and uses screw terminals to easily attach connections without soldering.I’m a bass player and computer geek that’s a huge StingRay fan, so I decided to design a preamp to recreate the vintage late 1970s StingRay sound – but modernize it and make it easier to work with.Design goals:Must reproduce the exact circuit used in late 1970s StingRaysMust use the original, now discontinued LM4250CN opamp that’s key to the distinctive sound and phenomenal battery life. I’ve installed the opamp in a socket so it was never exposed to the heat of a soldering iron. This also allows one to experiment with alternative opamps should you desire.Use screw terminals instead of soldered on wires to make installation easierIncorporate modern surface mounted electronicsAttractive silk screening with clearly labeled terminalsIncorporate a 1kΩ protection resister between the output jack and the LM4250CN opamp. Music Man attached this in between the output jack and the opamp to protect it from shorts that in rare circumstances could fry it. Other reproductions do NOT include this and it must be soldered on separately.Preamp characteristics:There are other replicas available online, some with the LM4250CN opamp and some with a substitute, but none that I’ve found met all of my requirements.The preamp has the following characteristics:Bass boost/cut (+14dB/-7dB at 40Hz)Treble boost/cut (+20dB/-16dB at 10kHz)Dimensions: 49mm x 17mm x 11mmThis kit includes:A25K (volume) linear taper potentiometerA100K (bass) audio taper potentiometerC1M (treble) reverse audio taper potentiometerQuality stereo audio jack, wired to preserve battery life9V battery clip with included Wago connector (so no additional soldering is needed should you have an existing 9V connector)Pre-cut and soldered extra-long wiring, which can be easily shortened to your needed lengthInstallation notes:This is an unusually designed preamp as Leo Fender designed it to obtain a particular sound. Thus, to recreate the late 1970s sound exactly the preamp needs to be paired with the following:25kΩ audio (log) or linear taper potentiometer (A25K or B25K). I recommend Alpha RV16AF-10-15K-A25K-3LA. The type of taper won’t affect the sound, just the volume curve. Early StingRays used audio tapers, Music Man switched to linear tapers in the early 80s.1MΩ reverse audio (log) taper potentiometer (C1M). I recommend Alpha RV16AF-10-15K-C1M-3LA.100kΩ audio (log) taper potentiometer (A100K). I recommend Alpha RV16AF-10-15K-A100K-3LA.Music Man style humbucking pickup wired in parallel with around 1800Ω resistance. Nordstrand MM4.2 and MM5.2 pickups are wired to the exact late 1970s specifications and perform very well.There are other replica pickups around, and the circuit will still sound good if you use a higher resistance pickup as found in Sterling by Music Man basses, but it won’t necessarily have the exact sound.When wiring, see attached image for which lug on the potentiometer is the wiper, CW (clockwise), and CCW (counter clockwise). Do not attach a battery until all components have been attached.This preamp should fit easily into basses with large control cavities or rear cavities (such as 5 string StingRays, StingRays with double humbuckers, and others). It will be a tighter fit in 4 string StingRays with crescent shaped control cavities, though it should fit. 16mm potentiometers (like the ones suggested above) are recommended as they’re more compact. Due to slight differences in routing between different models you may have more or less room.There is a manual online at my website: https :// www boscoemusic comFinal notes:Unfortunately I do not accept returns or refund requests as it’s easy to damage the preamp if you’re careless or don’t know what you’re doing. However I did design this circuit to be as durable as possible.This includes only the preamp, potentiometers, battery clip, jack, and wiring. You will need to obtain a pickup (if you don’t have one already). Screw terminals on the preamp require a 1.5mm precision flathead screwdriver to tighten.

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