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
    (8 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 4.875 out of 5 by 8.
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: 2015-02-04
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
Rated 5 out of 5 by from Very Good for the PriceEven though it says low power, cross it over 1.5k and your good to about 200W. Clean threads and sounds good. I use it in a horn/tweeter cabinet to match my guitar cabinet for a practice speaker. If your speakers are very efficient, these might not match well. Light weight for plastic horns. Would recommend for low power uses.
Date published: 2014-06-27
Rated 5 out of 5 by from Exactly what we needed and moreMuch better product than the factory horns at a better price, ordered for to replace them all....wholly upgrade!Even the lead guitarist in The Trent Hughes Band is happy with them....Wow!
Date published: 2014-06-25
Rated 5 out of 5 by from P i e z o,P i e zo,Piezo,and happy was my name oh!What a great sounding driver.Great for floor monitors.
Date published: 2014-05-19
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Product Q&A

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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
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