5103 McCullough Ave. Ste. 101, San Antonio, TX 78212
Phone: 210.384.4303
Hours of Operation: Tues-Sat from 11am-6pm

Custom Audio Amplifiers OD-100 Classic Plus Head (088)

By Custom Audio Amplifiers

$ 2,995.00
- +
Qualifies for FREE SHIPPING!!
See more: Amplifier

The OD-100 Classic Plus (CL+) captures the era of arena rock and the days when 100-watt amplifiers lined stages across the world. The OD-100 CL+ was built on solid fundamentals, combining the best characteristics of both classic American and British amplifier designs. This versatile, all in one amplifier is simple yet powerful offering you everything from punchy Blackface™era cleans to rich English style overdrive. Whether you are recording, performing or playing at home, the OD-100 CL+ will take you back to a time when music spoke to you.

The OD-100 CL+ is hand-built and features two footswitchable independent channels, a tube-buffered effects loop, a “Plexi-style output transformer and powered by four EL-34 power tubes for 100 watts of pure tube tone.



With the power switch in the OFF position and the Standback/Standby switch in the Standby position (O), flip the power switch to the ON (I) position. Wait sixty seconds, then flip the Standby switch to the Standback (I) position. This will prolong tube life.

To power down, simply switch the amplifier from Standback to Standby, then flip power switch to the Off (O) position.

(Located on Back)
(Located on Back)
I : ON, normal operation I : ON, normal operation
O : Power is switched OFF O: Power is switched OFF



Adds gain, turning Channel 1 into a crunchy ‘70s style overdrive when Gain 1 is cranked.

Adds sparkle and cut to Channel 1. Activate this switch when seeking modern Country or old school Funk style tones.

Adjusts the gain of Channel 1. Turning it clockwise will increase preamp gain and grind, which will offer a range of clean and crunchy Hard Rock tones. Turning it counter clockwise will reduce the amount of gain, for a clearer, more pristine clean tone.

Adjusts the amount of low end. Turning it clockwise increases the amount of bass, for a fuller, warmer Jazz style tone. Turning it counterclockwise will reduce the amount of bass making the tone thinner, making the midrange and treble response more noticeable.

Adjusts the midrange. Turning it clockwise increases the amount of mids, which gives your tone a fatter more vocal-like response. Turning it counterclockwise produces tones reminiscent of ‘90s Alternative style music.

Adjusts the top end. Turning it clockwise increases the amount of treble, giving your tone clarity and brightness. Turning it counterclockwise will produce a warmer sound, which is excellent for dialing in classic R&B and Jazz tones.

Adjusts the overall output of Channel 1



Adds bite and cut to Channel 2. Engaging this switch at higher gain settings yields an ‘80s style brown sound with excellent clarity.

Adjusts the gain of Channel 2. Turning it clockwise will add preamp gain for a variety of overdrive tones, from ‘70s thick and crunchy rhythms to smooth and rich, Hard Rock lead sounds. Turning it counterclockwise reduces the gain, which makes it ideal for modern style Blues playing.

Adjusts the amount of bass frequencies. Turning this clockwise increases the amount of low end thump, which is necessary for dialing in authentic hard rock and molten metal tones. Turning it counter clockwise will reduce the effect and tighten up the bottom-end, which is useful when performing at louder volumes.

Adjusts the midrange. Turning it clockwise increases the amount of mids, giving your tone a fatter harmonic response. Turning it counterclockwise will produce a mid-scooped sound well-suited for dialing up early Metal tones.

Adjusts the top end. Turning it clockwise enhances notes clarity and attack, perfect for single note riffing. Turning this counterclockwise produces a warmer singing lead tone, which is reminiscent of influential Northern California Pop Rock. 

Globally adjusts the top-end response of both Channels 1 and 2.

Adjusts the overall output of Channel 2

Adds an additional gain stage, which transforms Channel 2 into a high-gain ‘80s Rock lead machine.

Selects between Channels 1 and 2. To select Channel 2, press the Channel Select switch “IN”. The respective Gain 2 and Level 2 LED’s will illuminate.


The OD-100 CL+ has individual speaker outputs, therefore you must choose the appropriate speaker output jack(s) depending on the impedance (Ω) of your cabinet(s).

One 16 Ω cabinet, use the 16 Ω output jack.
Two 16 Ω cabinets, use both 8 Ω output jacks.
One 8 Ω cabinet, use one 8 Ω output jack.
Two 8 Ω cabinets, use both 4 Ω output jacks.
One 4 Ω cabinet, use one 4 Ω output jack.
Two 4 Ω cabinets, the OD-100 CL+ will not work with a 2 Ω load.


A speaker dampening control, that adjusts the overall feel of the power amp section. Turning it clockwise from the center offers a tighter more aggressive response. Turning it counterclockwise from center makes it spongier with more of a vintage sag and feel.

Adjusts the amount of low-end boost added to your amplifiers power section. This will provide more bottom end while retaining clarity.

The OD-100 CL+ comes standard with a tube buffered series effects loop which performs well with pedals and line-level rack gear. The return level control acts as the CL+’s master volume while the channel level controls become your send levels.

The OD-100 CL+ comes equipped with a dual footswitch for remote control of channel selection and between Channel 1 / Channel 2 and Boost 2. A stereo (TRS) cable is provided.


The OD-100 CL+ tube complement consists of four EL-34 power tubes and six 12AX7 preamp tubes.
Note: OD-50 CL+ consists of two EL-34 power tubes and six 12AX7 preamp tubes..​


Output: OD-100 CL+: Watts RMS
OD-50 CL+: 50 Watts RMS
Tubes: OD-100 CL+: four-EL34 & six-12AX7
OD-50 CL+: two-EL34 & six-12AX7
Front Panel:
Channel 1: Input, Boost 1, Bright, Gain 1, Bass, Middle, Treble, Level 1
Channel 2: Bright 2, Gain 2, Bass, Middle, Treble, Presence, Level 2, Boost 2, Channel Select
Back Panel: Power, Fuse / Power Entry Module, Standby / Standback, H.T. Fuse, Speaker Outputs, (4Ω, 8Ω, & 16Ω), Feedback, Depth, Effects Loop Send and Return, Return Level and Footswitch
Dimensions: 28.5” x 11.25” x 9.5”
Weight: 55 lbs.
Included Accessories: Dual Footswitch, Footswitch Cable, Cover and Power Cable
Option: Solid state series / parallel effects loop


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