Sunday, September 6, 2015

Yamaha THR10C Physical Modeling Guitar Amp: The Best Physical Modeling Guitar Amp?

Since the commercial proliferation of physical modeling DSP based guitar effects and amps since the early 1990s, does the 21st Century era Yamaha THR10C physical modeling guitar amp the best of them?

By: Ringo Bones 

Unlike the Yamaha THR10X which is geared more towards harder edged foot pedal dependent Texas Blues and heavy metal electric guitar tone, I only acquired the Yamaha THR10C because it was offered recently as a bargain in our local pawn shop and given that it is already out of warranty, my previous familiarity of its internal DSP / physical modeling circuitry allowed me to perform mods that allowed me to fit an external bigger speaker – i.e. a 15-inch electric guitar speaker with whizzer cone either by Celestion, Eminence, or Jensen or any other great old model or to connect it to another solid state guitar amp that has nary a physical modeling DSP preamplifier stage – to fully test out whether physical modeling DSP / digital signal processing based electric guitar amps had really progressed sonically or are still stuck in the post Operation Desert Storm euphoria of the early 1990s and only the ergonomics had evolved. 

Priced at around 450 US dollars when it hit the market during the middle of 2013, the Yamaha THR10C or specifically the amp’s DSP / physical modeling circuit – according to Julian Ward of Yamaha UK – was originally developed from the physical modeling technology used for the 1993 era VL1 Synth, thus explains my familiarity of the amp’s innards given I was repairing and servicing something like it since the end of Operation Desert Storm. Given that the other DSP based physical modeling guitar amp I can compare it side-by-side with is the 1997 era Line 6 AxSys 212, all I can say is makers of physical modeling amps completely missed the boat market-wise of the mid to late 1980s hair metal boom where such devices would have proved a godsend if they where available in their mid to late 1990s incarnations. 

With its 24-bit  A/D D/A converters sampling at 44.1KHz to guarantee 16-bit fidelity Redbook CD ready tone, the Yamaha THR10C’s five settings really proved useful if your preferred genre of music is 1960s era electric Blues and early 1970s era Classic Rock. Sadly, the Yamaha’s built-in small speakers will be found wanting when you crank it up in a beer pub gig setting. With the mod I recently did, every working musician in my neighborhood who use the Yamaha THR10C as their main gig amp in the local beer pubs in our neighborhood are now paying me to have theirs with a switchable option to hook up a 15-inch external electric guitar speaker with whizzer cone like the Eminence Red Coat Big Ben model or similar mounted in an open baffle. Sadly when used in such configuration, such a revealing external speaker as the 15-inch Eminence allows you to hear the “quantization noise (?) / or very low level click-click noise” of the Yamaha THR10C’s physical modeling DSP chip when you crank the amp’s volume to have it roaring at around the 110 dB SPL level. Sadly, to my audiophile trained ears at least, physical modeling DSP guitar amps are indeed really stuck in the time of post Operation Desert Storm euphoria of the early 1990s in terms of sonic performance. Although once you switch back to the built in tiny speakers, it allows you to practice in relative silence without the threat of eviction, divorce or arrests for disturbing the peace. But like all physical modeling DSP based guitar amps produced since then, its recording options will easily allow you to record AC/DC like electric guitar tones without resorting to cranking up your amp to play at AC / DC concert volume levels – i.e. 120 to 130 dB sound pressure levels. 

But if you’re involved in a cover band whose guitar tones are more akin to Avril Lavigne’s first two albums, the Line 6 AxSys 212 with its patent pending Tube Tone physical modeling DSP system is a better choice because such guitar tones can easily be had by twiddling the Line 6 AxSys 212 controls. It took me between 45 minutes to an hour toying with the Line 6 for the first time back in 2004 when I bought one after it was offered as a bargain in our local pawn shop. The 1989 Soldano Super Lead Overdrive setting is a good starting point in the Line 6 by the way. Inexplicably, Line 6’s top of the line products are “conventional” vacuum tube based electric guitar amplifiers equipped with either the EL34, EL84 and 6L6 output tubes – as opposed to solid-state based electric guitar amps with a physical modeling DSP tube emulation based preamplifier stage. Tone wise, it seems that all physical modeling DSP based solid-state electric guitar amps I’ve tested so far is stuck in the early 1990s – only the ergonomics and ease of desktop PC recording connectivity had improved which explains why high fidelity solid state integrated amplifier manufacturers still had never used these physical modeling DSP chips into the preamplifier sections of their amps so far. 


  1. The Line 6 AxSys 212's 1989 Soldano Super Lead Overdrive setting - especially if you EQ it to make it sound more Marshall crunchy tends to sound like the guitar amps used in the recording sessions of Avril Lavigne's first two albums indeed.

  2. I think the guitar amp / guitar effects company Line 6 was the main sponsor of Avril Lavigne's 2004 Bonez Tour.

  3. Like those early 1990s era Tech 21 SansAmp - I think the main raison d'etre of the Yamaha THR10C is that it allows us to "record" the "timbral roar" of a full-on Marshall stack at an AC/DC stadium rock concert in our very homes where playing an electric guitar amp at AC/DC stadium rock volume levels will either land us in jail or get evicted.

  4. Hi Ringo! Can you please tell me how to hook up the thr10c to a mixer into a PA system using its headphone input and y-split cable? Thank you!

    1. Most of the THR10C units I got my hands on - via after market repairs - are modified by their owners so that their line-level in and out ports can accept those 1/4 inch phone plug sockets - i.e. electric guitar plugs - that are often de rigueur in studio and concert stage use. I've heard that most units sold here in SE Asia are equipped with USB type I/O ports. Most Y- Split cables that I currently own are RCA type and are mostly used in my home hi-fi multi-amping use. I've seen Y-Split cables that can accept 1/4 inch phone plugs being sold in SE Asia music stores that also sell electric guitars and amps. Just connect them with male to female parings with the appropriate length of cable given that the THRC10C can drive coaxial type RCA cables of up to 40-feet in length without noticeable loss of high frequency signals or radio-frequency interference. But things can get a bit difficult if your THR10C only has USB type I/O line-level ports.