Dr Bonkers Guitar Cab-Oddities™ Volume 4: POLY 1X12 Guitar Cabinet IR Collection


Dr Bonkers presents the Dr Bonkers Guitar Cab-Oddities™ Volume 4: POLY 1X12 Guitar Cabinet IR Collection based upon a 1980’s Polytone® Mini Brute II™ 1 X 12 Guitar or Bass Amp Cabinet. This cabinet included the original Polytone® Proprietary 12 inch Speaker for Guitar and Bass.

Dr Bonkers impulse response file tribute to this cab is featured in both Fractal Audio Systems® file format, WAV format, and a buy both bundle. Pull down on the menu below to see details on each pack.

Below where it says “Description” in bold type, please click below on the arrows or grayed out words to hear sound samples or see more information (see images below main product image if this is not clear- one is mobile view, one is desktop computer view).



Zak Rahman demos in metal, rock, and jazz styles of the Polytone® Mini Brute II™ 1X12 Bass & Guitar Cab impulse response (IR) files in action:

Solo guitar recorded by Jorge Goncalves using Amplifire® and this WAV impulse response file cab collection. See SoundCloud description for more details.

Andre LaFosse recorded four quick improvs, each using a different combination of two IRs from the Dr. Bonkers Poly 1X12 collection. The same guitar, amp, and reverb settings were used for each demo track:

  •  Reverend Avenger TL on bridge pickup
    • Kazrog Recabinet 5 for IR loading and mixing (set completely flat – no eq, speaker dynamics, or other Kazrog enhanced features here)
    • Scuffham S-Gear 2 on the “Duke” amp model (no Scuffham IRs/speaker sims used)
    • Valhalla Room for early reflection reverb/stereo imaging

Eugene Shapiro demo:

Mike Vasas demo playlist:

All tabbed information is for both WAV and Fractal Syx format Cab IR Packs unless otherwise noted.

WAV version is available for immediate purchase. Fractal Syx version is available for immediate purchase. Combo is available for immediate purchase.

Please click above to hear sound samples or on the arrows or tabs to see more information.

Use of Polytone® & Mini Brute II™ are owned by their respective corporate entities and mentioned on this site under the terms of fair use. Use of Fractal Audio Systems®, AX-8™, Axe-FXII™, Cab Lab3™, and Ultra-Res™ are owned by Fractal Audio Systems® and mentioned on this site under the terms of fair use. Any band names or artists mentioned in a purely historical & educational context are owned by their respective corporate entities and mentioned on this site under the terms of fair use. All such mentions do not connote any endorsement, approval, or use of Dr Bonkers Soundlab LLC® products. The trade name of HypeReal™ in the context of Cabinet Impulse Response Packs as well as the actual files for sale on this website are the intellectual property of Dr Bonkers Soundlab LLC® and may only be used under the terms of the EULA.

Additional information

File Type

Fractal Audio, Wav File, Combo Pack (Fractal & Wav Files)

Impulse Response (IR) File Inspired Cabinet Info (Click Here)

Inspired Model Recorded as Impulse Response (IR) Files: 1980’s Polytone® Mini Brute II™ 1 X 12 Guitar or Bass Amp Cabinet

Speakers Loaded in Model Captured: 1X12 Polytone® Proprietary 12 inch Speaker for Guitar and Bass

Microphones Used (Click Here)

Microphones Used in This Cab Impulse Response (IR) Cab Pack:


AKG 451 EB

AKG D-12vr (used in passive mode)

Audio Technica AT4033

Audix D6s

Avantone CV12

Beyerdynamic M-160

Blue Electronics “The Ball” (used in “active mode”)

David Bock Audio – Soundelux U97

Crown PZM-6D

Electro-Voice RE-10

Electro-Voice RE-20

Neumann u89i

Sennheiser MD 421 II

Sennheiser MD 441

Shure SM57

Shure SM81

Past Brand Cabinet Users (Click Here)

Here are some famous players who were rumored to have historically used a similar type of cabinet in the past as reference and educational purposes for your tone quest or inspiration:


Carol Kaye – Legendary Bass and Guitar Studio Session Musician

Ray Brown – Jazz Upright Bass & Cello Legend

Joe Pass – Jazz Guitar Legend

Jim Hall  – Jazz Guitar Legend

Howard Roberts  – Jazz Guitar Legend, Wrecking Crew Guitarist

George Benson  – Jazz Guitar Legend

Jack Wilkins – Jazz Guitar Virtuoso

Photo of 1X12 Polytone® Proprietary 12 inch Speaker (Click Here)

Historical Info (Click Here)

Polytone® was founded over 40 years ago in California, USA, and was making amp combos that people used for accordion, keyboards, jazz guitar, electric bass, and upright bass.. Interestingly, the company was founded by a jazz accordion player of fame for that era.

The small closed back cabinet is lightweight, deadened with what looks to be fiberglass insulation, but the combo sounds pretty stark and revealing- dark at lower volumes and with a bit of a bite at louder volumes. The speaker design is way over-engineered for strictly guitar use, as it doesn’t bottom out or fart like most guitar speakers when you try to play bass guitar through them at gig volume. But the Polytone®  also doesn’t sound like a blanket is over the speaker when playing guitar through it, unlike some prominent bass speakers sound when playing guitar through them.

Impulse responses made with this cab can really sound great with many different types of digital amp models using clean or light gain, even bass amp models. If you try to play black metal or djent with these impulse response (IR) files, you will probably be very disappointed in them just as you would be with the real cabinet.

Wav & Combo Pack File Compatibility Info (Click Here)

Please check the documentation of your Yamaha® THR-100™, Kemper® KPA™ (Kemper Profiler Amp), Line 6® Helix™, Boss® GT-1000™, Two Notes® Torpedo™, Atomic Amps® Amplifire™, NuX® Cerberus™, AMT® Pangaea CP-100™, Positive Grid® Bias™, or other hardware or software based Impulse Response (IR) loader to see which WAV file format is correct to use.

All company trademarks for Fractal Audio Systems®, Yamaha®, Line6®, Kemper®, Boss®, Two Notes®, AMT®, NuX®, Positive Grid®, Atomic Amps®, Digitech® are owned by their respective corporate entities and mentioned under fair use.