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Bass Boost cMoy v2.03
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Store Home > Headphone Amplifiers >
Item#: cMoyBB203
Alps RK097 Volume Control and On/Off Switch
Bass Boost Toggle Switch
DC Auxiliary Power Jack
Automatic On/Off (senses headphone cord)
Texas Instruments OPA2227 Opamp in Gold-Plated DIP Socket
Texas Instruments TLE2426 Precision Virtual Ground (2x optional)
Decoupling Capacitors on All IC Supply Pins
Custom 2-Layer PCB: Compact Layout with Ground Plane
Run-Time: 8-50 hrs
Frequency Response: +0.01, -0.01 dB (20Hz-20kHz)
Output Impedance = Impedance of Opamp
Enclosure Size: 116 x 64 x 21 mm
Weight: 3.6 oz
New Bass Boost cMoy v2.03 Headphone Amplifier
Free 9V battery (with standard amplifier)
Instructions Sheet: Standard, Rechargeable
cMoyBB v2.03 Headphone Amplifier
Fully assembled, hand tested Bass Boost cMoy v2.03 headphone amplifier. Includes 9V battery. PCB color may vary. Customization options. . .
IN STOCK
- Description
- Features
- Specifications
- Included
- Options
Standard features of the Bass Boost cMoy are summarized below.
Questions? Contact us.
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Exclusive Bass Boost Switch
The cMoyBB ships with an internal bass boost toggle switch. Switched off, the original, flat audio signal is amplified. Switched on, bass is increased up to 9.4 dB, just shy of a perceived 2x increase in bass volume.
Do-it-yourself builders have the option to substitute the bass boost toggle switch for a bass boost control knob.
Printed Circuit Board (PCB)
Most cMoys are built on protoboard and use thin wires to transfer the audio signal, making them prone to interference and signal degradation.
The cMoyBB v2.03 uses a top-layer ground plane and tightly optimized signal traces, easily outperforming hand-soldered protoboard connections. Proprietary software was used during design of the PCB to check for proper impedance characteristics and negligible crosstalk. Such attention to detail cannot be achieved in protoboard amplifiers, or even in circuit boards designed by most hobbyists.
Not sure what all of this means? Check out the cMoyBB reviews.
Power System
A Texas Instruments TLE2426 precision rail splitter and 25V, low noise Nichicon 470 uF capacitor are used to eliminate the unbalanced resistor divider power system found in standard cMoys. The cMoyBB handles more than double the voltage of most cMoys, meaning the dynamic range of high impedance headphones can be extended even further when using a high voltage DC adapter. Version 2.03 optionally allows for a second TLE2426 rail splitter, giving the cMoyBB more current handling capability than ever!
The cMoyBB v2.03 also employs ceramic decoupling capacitors on all IC power pins. Decoupling helps to prevent IC supply ringing, which significantly enhances opamp stability and sound quality.
DC Auxiliary Power Input Jack
Any regulated 9-24V DC power adapter with a 1.3mm x 3.5mm DC jack can be used to power the cMoyBB amplifier. Connecting a DC power adapter to a non-rechargeable cMoyBB automatically and safely disconnects the 9V battery.
cMoyBBs equipped with NiMH recharging circuitry use the same jack to charge the battery. The cMoyBB can be used while charging!
JDS Labs does not sell or include AC/DC adapters. However, a DC adapter can be purchased for as little as $10 (USD) in North America. See Instructions for details.
Enclosure
The cMoyBB v2.03 is cased inside of a brand new* Altoids® Peppermint tin, protecting the circuit from some forms of external EMI / RF interference. Foam support keeps the battery securely in place. Other mint tins are sometimes in stock. Contact us if you have something specific in mind.
*Despite each tin being brand new, Altoids® tins occasionally have some sort of scratch or dent (not always!). Additionally, you should anticipate minor jack mounting imperfections due to the hand built nature of the product. Please excuse these possible minor cosmetic defects. Thank you!
Questions? Contact us.
-->
Exclusive Bass Boost SwitchThe cMoyBB ships with an internal bass boost toggle switch. Switched off, the original, flat audio signal is amplified. Switched on, bass is increased up to 9.4 dB, just shy of a perceived 2x increase in bass volume.
Do-it-yourself builders have the option to substitute the bass boost toggle switch for a bass boost control knob.
Printed Circuit Board (PCB)
Most cMoys are built on protoboard and use thin wires to transfer the audio signal, making them prone to interference and signal degradation.
The cMoyBB v2.03 uses a top-layer ground plane and tightly optimized signal traces, easily outperforming hand-soldered protoboard connections. Proprietary software was used during design of the PCB to check for proper impedance characteristics and negligible crosstalk. Such attention to detail cannot be achieved in protoboard amplifiers, or even in circuit boards designed by most hobbyists.
Not sure what all of this means? Check out the cMoyBB reviews.
Power System
A Texas Instruments TLE2426 precision rail splitter and 25V, low noise Nichicon 470 uF capacitor are used to eliminate the unbalanced resistor divider power system found in standard cMoys. The cMoyBB handles more than double the voltage of most cMoys, meaning the dynamic range of high impedance headphones can be extended even further when using a high voltage DC adapter. Version 2.03 optionally allows for a second TLE2426 rail splitter, giving the cMoyBB more current handling capability than ever!
The cMoyBB v2.03 also employs ceramic decoupling capacitors on all IC power pins. Decoupling helps to prevent IC supply ringing, which significantly enhances opamp stability and sound quality.
DC Auxiliary Power Input Jack
Any regulated 9-24V DC power adapter with a 1.3mm x 3.5mm DC jack can be used to power the cMoyBB amplifier. Connecting a DC power adapter to a non-rechargeable cMoyBB automatically and safely disconnects the 9V battery.
cMoyBBs equipped with NiMH recharging circuitry use the same jack to charge the battery. The cMoyBB can be used while charging!
JDS Labs does not sell or include AC/DC adapters. However, a DC adapter can be purchased for as little as $10 (USD) in North America. See Instructions for details.
Enclosure
The cMoyBB v2.03 is cased inside of a brand new* Altoids® Peppermint tin, protecting the circuit from some forms of external EMI / RF interference. Foam support keeps the battery securely in place. Other mint tins are sometimes in stock. Contact us if you have something specific in mind.
*Despite each tin being brand new, Altoids® tins occasionally have some sort of scratch or dent (not always!). Additionally, you should anticipate minor jack mounting imperfections due to the hand built nature of the product. Please excuse these possible minor cosmetic defects. Thank you!
Please mention your headphones during checkout for free customization. In addition to headphone adjustment, the cMoyBB can be assembled in four ways:
Standard, Non-rechargeable, 1x9V battery. Best for most users. External DC jack can be used to power the amplifier; does not charge battery.
Standard, Non-rechargeable, 2x9V batteries (18V). Recommended for high volume listening with 120+ ohm headphones.
Rechargeable, 1x9 battery. Ideal for portable use of most headphones. Includes 1x9V Tenergy low self-discharge NiMH battery. Requires a 10V+ AC/DC adapter (not included)!
Rechargeable, 2x9 batteries. Recommended for portable use of 120+ ohm headphones. Includes 2x9V Tenergy low self-discharge NiMH batteries. Requires a 19V+ AC/DC adapter (not included)!
Power adapter information can be found in the cMoyBB instructions:
cMoyBB v2.03 - Standard Instructions Guide
cMoyBB v2.03R - Rechargeable Instructions Guide
Power adapter information can be found in the cMoyBB instructions:
cMoyBB v2.03 - Standard Instructions Guide
cMoyBB v2.03R - Rechargeable Instructions Guide