Manuals & Resources

GRS PZ1188 Piezo Horn Driver Similar to KSN1188A

Brand:|Model: PZ1188
Finally, an affordable drop-in replacement for those vintage KSN1188A piezos! GRS piezo tweeters are built using a 22 mm ceramic piezo element, to the original CTS specifications.
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List Price$8.99
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Part # 292-450
  • Perfect replacement for many classic loudspeakers
  • No crossover required - great for simple, economical designs
  • Great for super tweeter applications in DJ/Karaoke systems
  • Equal or superior to products being sold for 8-10 times our price!
  • 22 mm ceramic piezo element that follows original CTS specs

Product Details

GRS PZ1188 Piezo Horn Driver Similar to KSN1188A

The PZ1188 is specifically designed and engineered to be a replacement for the very popular KSN1188A piezo horn drivers from days gone by. Using a 22 mm ceramic piezo element, GRS piezo tweeters follow CTS' original recipe and are far superior to most look-alike piezos.

Standard 1-3/8" 18-TPI threads facilitate use with 1" horns. With a wide frequency range and ample power handling, this is also a prime candidate for new designs, especially if the crossover requirements must be kept to an absolute minimum. This 100 watt driver incorporates advanced protective circuitry which allows it to be used at power levels of up to 400 watts.

Specifications: • Power handling: 400 watts max • Frequency response: 800-20,000 Hz • SPL: 93 dB 1W/1m • Dimensions: Diameter: 3-7/8", Depth: 3".

Product Specifications
  • Mounting Type1-3/8"-18 TPI
  • Diaphragm MaterialPiezo Ceramic
  • Power Handling (RMS)100 Watts
GRS PZ1188 Piezo Horn Driver Similar to KSN1188A
  • BrandGRS
  • ModelPZ1188
  • Part Number292-450
  • UPC844632005633
  • Product CategoryHorn Drivers
  • Unit of MeasureEA
  • Product Rating
    (11 Reviews)
  • Weight0.4 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

View similar products to the GRS PZ1188 Piezo Horn Driver Similar to KSN1188A
in the Horn Drivers product category.


GRS PZ1188 Piezo Horn Driver Similar to KSN1188A
GRS PZ1188 Piezo Horn Driver Similar to KSN1188A is rated 4.9091 out of 5 by 11.
Rated 5 out of 5 by from excellent driver.this driver is well built and provided a darn good signal as far as for the purpose i used it which was to transmit high frequency tones.
Date published: 2015-11-16
Rated 5 out of 5 by from Surprisingly good tweetersI used these in a pair of budget PA/HT front mains with the PRV WG23-25 waveguides and a pair of GRS 12PF-8's per cab. 4 cu ft sealed, 3/4 birch ply with a double front baffle and moderately braced and stuffed. I used a 1.8k second order for the highs and the lows at 2k first order. These tweeters are really good, they surprised me. I figured I'd try em and upgrade the driver and crossover if they disappointed. Well as long as they hold up, I don't see them getting swapped anytime soon. Definitely not the junk piezos you used to find in the cheap car wedge boxes. They're surprisingly detailed and crisp without being the least bit harsh.
Date published: 2015-10-28
Rated 5 out of 5 by from It's all in how ya use them.I'm not trying to fill a party hall with sound. Everyone seems to have their own take on piezos. I have felt for a long time now, they do have a place in Hifi. There are some notes, tones, and harmonics with, that only a piezo can pull off. I have two of these in my living room screwed to Goldwood GM600PB horns. The trick is don't get crazy with the power. I feed them with a Kinter MA-170 amp 18w X2 high pass 3500 Hz. That's all these need to keep up with the rest. Over the years many piezos have come and gone. These are some of the smoothest, and clearest piezos I've heard. For the price and the sound. You would be hard pressed to come up with a reason to spend more. Piezos, it really is how ya use them, and for what I'm doing with them in my corner of the world. They get 5 stars.
Date published: 2015-09-24
Rated 5 out of 5 by from Great for replacementsThese are a great investment. They are inexpensive and easy to use. Sound is really good! Glad I bought them.
Date published: 2015-05-12
Rated 4 out of 5 by from Great Inexpensive Repacement PartThese do the same job as more expensive drivers but at a third of the price! They also have a built in crossover as well! Great Product at a Great Price! I have recommend these drivers to many of my customers and friends!
Date published: 2015-04-20
Rated 5 out of 5 by from Works well as replacementI have been purchasing these as replacements for drivers in DJ speakers that have been over driven. They handle more power than the original drivers and last longer. The only "issue" they have is the tread size is smaller than the original drivers, but this is taken care of with one wrap of 100 MPH tape. (AKA duct tape) Just trim it to fit the threads and give it one wrap. Snug fit that won't come loose.
Date published: 2014-09-20
  • 2015-11-28T06:32CST
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  • clientName_PartsExpressInternational

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
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please email tech@parts-expresss.com  for a prompt reply.
GRS PZ1188 Piezo Horn Driver Similar to KSN1188A

According to the specs shown, this driver's frequency response picks up at 800 Hz. That seems awfully low for a piezo. Is that correct or a typo?

Asked by: jgrammon
That is likely factoring in the Fs of the driver. I would not cross this any lower than about 1,500 Hz.
Answered by: MattP
Date published: 2014-03-20

Does this driver have the same protection circuitry as the orginal Motorola/CTS design?

The original design used a protection circuit with a resistor and thermal breaker paralleled with a tiny light bulb. Does this design have any protection circuit at all or is it just the piezo element?
Asked by: windeguy
This driver does have built in protection similar to the original CTS driver.
Answered by: MattP
Date published: 2013-08-28

Can I use this tweeter and achieve good fidelity in the following configuration? See additional details.

2 class D amplifiers 1 powering a sub woofer the other powering a mid/tweeter coaxial. (Mid driver is Beta-8CX with this tweeter).I would integrate the Berhinger Ultra Drive as a 2way x-over and assume the tweeter can be properly attenuated with a resistor orL pad.If this makes sense any suggestions for passive tweeter control would be helpful.
Asked by: Footer
These will work fine for the application but fidelity is a matter of opinion. There are many people who like the sound of piezo tweeters and many others don't. For an inexpensive high frequency option they are hard to beat. If you want to use an L-pad with this, you will have to wire an 8 ohm resistor in parallel with the piezo and any 8 ohm L-pad will work.
Answered by: MattP
Date published: 2013-05-06

Appropriate horn

Can this driver be used with a GRS PZ1025 2" x 6" horn?
Asked by: Mark Andrews
I used the Goldwood GT-400PB and Eminence Emitter EM:200S horns in my PA application. They're the only ones that I tried, so I can't give any comparisons. I haven't taken any sound measurements, but, for my requirements (Rock Blues Band), they seem to do the job well enough.
Answered by: Honk
Date published: 2013-01-01

Using a piezo driver wth a x-over

If I am going to use a piezo driver in a system with a 3 way passive x-over should I wire a resistor parallel to the piezo?
Asked by: dodaddio
Yes you will want to wire an 8 ohm resistor in parallel with the driver.
Answered by: MattP
Date published: 2012-12-05
  • 2015-11-28T07:06CST
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  • clientName_PartsExpressInternational
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