Fender ToneMaster Twin and Deluxe Reverb ARM Quad Core Amps

Started by admin, September 26, 2019, 11:28:32 PM

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https://www.fender.com/articles/gear/first-look-dive-into-fenders-2019-summer-namm-debuts
In a bold Fender first, the Tone Master Twin Reverb amplifier uses massive digital processing power to achieve a single remarkable sonic feat: faithfully modeling the circuitry and 85-watt power output of an original Twin tube amp. Using a high-performance 200-watt digital power amp to achieve the headroom and dynamic range of a real vintage Twin tube amp, paired with the pronounced sparkle and clarity of two Jensen® N-12K neodymium speakers and a resonant pine cabinet, the result is tubeless Twin Reverb tone, volume and dynamics virtually indistinguishable from the all-tube original. And with all these features, the Tone Master Twin Reverb is in fact about only half the weight of an all-tube Twin.

Front panel features give guitarists a playing experience identical to the tube version, including Fender's world-standard reverb and tremolo effects. Additional rear-panel features deliver modern convenience and flexibility—including an output power selector for full power and five attenuated settings, balanced XLR line output with impulse response (IR) cabinet simulations, mute switch for silent stage or recording use, USB port for firmware upgrades, and more.

FEATURES
Two Jensen N-12K neodymium speakers
Normal and Vibrato channels, each with two inputs and Bright switches
Rear-panel output power selector for full power and five attenuated settings
Balanced XLR line output with impulse response (IR) cabinet simulations, level control, and ground switch
Lightweight, resonant pine cabinet
Power jewel illuminates in different colors for normal operation, warmup, and mute/silent mode
USB port for firmware upgrades
Universal worldwide 100V – 240V operation
Cover and two-button footswitch included

https://shop.fender.com/en-US/guitar-amplifiers/contemporary-digital/tone-master-deluxe-reverb/2274100000.html









admin

Well - this is NOT a respun Mustang GT ;)







PCB LEFT= ICE POWER  200AS1 Amplifier Module
https://icepower.dk/products/amplifier-power-modules/as-series-intelligent-audio-amplifier-power/
https://www.scribd.com/document/407469209/ICEpower-200AS1-Datasheet-1-3

https://www.audioxpress.com/news/icepower-announces-200as1-amplifier-module-designed-for-guitar-amplifiers-bass-amplifiers-and-subwoofers

Applications

Bass amplifiers
Guitar amplifiers
Subwoofers
Active 2-way hifi speakers and studio monitors
Key Performance Parameters

Output Power per channel 1 % THD+N, 20 Hz – 20 kHz   200 W (4 Ω)
100 W (8 Ω)
Output Power per channel 10 % THD+N, 20 Hz – 20 kHz   255 W (4 Ω)
Minimum load impedance   3 Ω
Maximum amplifier efficiency   –
Maximum total amp+psu efficiency   78 %
Supply voltage input   85-264 VAC
Peak output current   24 A
Dynamic range   109 dB
Amplifier maximum output peak voltage per channel   41 V
Output referenced idle noise (A-weighted)   92 µV
THD+N 1 W/1 kHz   0.006 %





PCB CENTER = ARM Quad Core RISC Processor board  - see the SDCARD slot on the right for R&D Firmware load.
tough to know more details as most bits are under that giant heat sink  - but it looks like a  typical four Core ARM Cortex-A53 Module
perhaps similar to this



PCB RIGHT  = Analog Input A/D  / D/A   - using a
Cirrus Logic C42435  (108 dB, 192 kHz 4-In, 8-Out TDM CODEC)
https://statics.cirrus.com/pubs/proDatasheet/CS42435_F5.pdf

Good choice - this allows Fender to use same CODEC across a wide array of future product lines  - and can accommodate FX Loops, and possible separate EQ for XLR Out, vs the analog feed to the IcePower AMp Board

Two of the 4 available A/D's are employed as a Stacked design to increase dynamic range for the DSP (as employed by Fractal)
Quote* Stacked a/d converters. To make a significant improvement in dynamic range, a stacked a/d converter architecture can be used. In this approach, the signal is split into multiple paths, each with a different gain before input to the a/d converter. If, for example, three a/d converters are used, they would capture large, medium and small signals respectively and the final output would be selected from the most appropriate a/d converter.
http://www.newelectronics.co.uk/electronics-technology/stretching-the-dynamic-range-of-a-d-converters/46404/


And employs JRC NJM2746 rail to rail Dual OpAmps with a low noise of 10nV/√Hz
https://www.njr.com/semicon/products/NJM2746.html

On the Far Right are TI OPAxxx ( cant read it ) low noise quad op amps
http://www.ti.com/amplifier-circuit/op-amps/products.html&sort=p480;desc

and note the "No Stuff"  parts on the left  - J703, etc  -  appears to be an aborted headphone Output jack using a PCB Footprint that can accept Cliff/Rean style switching TRS Jack from mutliple 2nd sources (Neutrik , Shogyo, etc)
http://shogyo.com/product-category/connectors/audio-connectors/audio-connectors-audio-jacks/page/4/?filter_audio_standard=6-3&filter_mono_or_stereo=stereo