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Acousti-Phonic Onboard Preamp

4.5
  • 6 Reviews
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Acousti-Phonic Onboard Preamp

Item # 5444
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$61.16

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Acousti-Phonic Onboard Preamp

About This Item

Acoustic sound for solidbody guitars! The Acousti-Phonic Onboard Preamp handles switching and interfacing to a mixer or guitar amp.

Includes adjustable gain pot, stereo switching jack and battery clip. 9-volt battery required.

1-1/8" x 1-5/8" x 1/2"
(28.58mm x 41.28mm x 12.70mm)

The guitar's control cavity may need to be routed to make room for the preamp.


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4.5
  • 4.67 average rating from 6 reviews
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4.0

Poor or NO selection of components and a mediocre circuit design = noisy. 

By
(Customer's Reviews)


IN NINE words: I have heard better, and I have built better. Noisy op amps. These SHOULD have been selected from a better brand or type AND THEN hand screened for noise with a treble boost circuit. There are no shortcuts to a premium piezo preamp, and this is another mediocre product that exemplifies this fact. I was underwhelmed, to say the least. Stewmac has been with us on the bench and in the shop for almost 50 years now, and not every product is a winner, and some of the great products fall by the wayside. Let's hope this product, improves or Stewmac moves on and discontinues this one. I have found better PPAG boards on Chinese eBay sites. Lets start with Op Amps no one can find anymore, like a TL062. The TL060, TLO72 and TL082 are basically all the same. The TL062 had the least noise, and TL072s and 82s were not worthy of a TL062 part number. Components like the TLO62 became kind of obsolete in the critical analog amplification circuits of analog telephony, so the manufacturers just lumped all the quieter ones into the TL072 category, rather than sort out the best ones, and keep the high quality op amps in their catalog. Now lets look a companders. The SA570 is almost impossible to find. The SA571 and SA572 are noisier versions of the SA570. The 572 being the least desirable of the three. You can hand select PREMIUM grade op amps for noise, and have a superior product and send the rejects to be used into some cheesy stomp box, or you can design cheesy on-board pre-amps. The sound quality of these is also pretty generic, and low grade average at best, despite all the hiss. Even running into a line level preamp & buffer and through a line level balanced XLR plugged into a mixer, these are still pretty mediocre. That includes trying to bring out some tone and timber with delay, compression, and or expansion with studio quality gear. It's a sound all it's own, but it is hardly the sound of a good quality acoustic guitar. Given the price is under $100 I will give it 4 stars, but it is just not a 5 star product. These will make an okay preamp for Ghost Saddles, or piezo loaded Schaller, AMB or other bridges. You can also roll your own piezo saddles with a 3D printer or machine tools, and piezo electric plasticized strips, crystals, blocks, etc.

5.0

Used as a standalone

By
(Customer's Reviews)


I used this system on an enclosed semi-hollow T-style guitar with no controls or other pickups, just plug and play. To my ears, you're best off running the system through a dedicated acoustic amp. The subtleties, nuances and dynamics of a big resonant acoustic guitar are all there, and responds very well to finger picking, without having to lug around something the size of a tea chest. Yes it's not a real acoustic, but then the Rosewood I used wasn't a real Rosewood and that didn't harm the sound in any way either.

5.0

Preamp for Teles

By
(Customer's Reviews)


Have built 2 teles using ghost saddles, preamp and quick switch. I like that I can adjust the gain of the preamp to match my pickup volume. Preamp is really small but my guitars were semi hollow to allow easy installation.

5.0

teles with ghost saddles and preamp

By
(Customer's Reviews)


Built 2 teles with ghost saddles, preamp and quick switch. Bodies were semi hollow to make installation easy. Band members like that I can switch from acoustic to magnetic pickups at the flick of a switch. Recommend battery box be used

5.0

I love these things

By
(Customer's Reviews)


I have installed a number of these systems with the Ghost saddles and TOM bridges and they are rock solid and beautiful sounding. I have put them in everything from Strats and Tele's to Custom Shop 335's and a Gibson Johnny A (the Johnny A sounded increadible, it's a fully hollow guitar but plays like a solid body. Not sure why the one guy is getting white noise, I have never had this issue and some of the systems I have in are used by touring musicians who get great compliments on the sound. You do need to be careful with the grounding and I suggest using a good quality acoustic amp for the piezo side.

4.0

Great sound!

By
(Customer's Reviews)


The graphtech piezo system will give you great acoustic sound. Very clean, crisp and bright. Great for guitar players who primarily play electric but might need an acoustic tone for a few songs. You can go from your regular magnetic pickup sound to acoustic with a flip of a switch.

For those of you who have never used a piezo system before don't expect it to sound 'just like an acoustic guitar' This sound will not have the depth of a real acoustic. It sounds more like an electro acoustic guitar but yet even different from that. I feel the piezo sounds best running direct to a mixer rather than an amp. This is also a great sound for studio, you can get it to sound very close to a real acoustic by tweaking the tone knob (if you install one) and using some EQ (I use a RC booster for this)

However I must also mention this piezo system adds a white noise to your signal that's always running in the back ground and is boosted even more when you play through a distorted setting. It won't go away no matter what you try, even if your piezo volume is down to zero.



StewMac PDF Catalog, page 45 See Acousti-Phonic Onboard Preamp
on page 45 of our StewMac Catalog PDF

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