Boston Acoustics ISTS

Imaging System Type-S1 1" Kortec® dome tweeters

  • Boston Acoustics ISTS


  • Boston Acoustics ISTS

    Tweeter closeup

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You'll have to custom-mount tweeters or midrange speakers, which usually requires drilling holes and running new wires.
Item #: 065ISTS

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Our take on the Boston Acoustics ISTS

by Jo Greene
Boston Acoustics

If the music in your car leaves you uninspired, here's a great way to brighten things up. Install Boston Acoustics' ISTS tweeters in a good location in your interior, and you'll hear a whole new world open up. These 1" tweeters add the high-frequency details that create a stronger stereo image and give you more realistic sound.

These dome tweeters are made from Kortec®, a strong, lightweight material that's well-suited for high-frequency reproduction, so your highs can really sparkle without sounding shrill. The included crossovers prevent lower frequencies from reaching the tweeters and compromising sound quality. The package includes hardware for flush-, surface-, and angle-mounting your tweeters, so you can choose the best configuration for your soundstage.

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  • 1" Kortec dome tweeters
  • flush-, surface-, and angle-mount hardware included
  • IS Type-S external crossovers
  • power handling: 2-40 watts RMS (100 watts peak power)
  • frequency response: 8,000-22,000 Hz
  • sensitivity: 90 dB
  • top-mount depth: 1"
  • warranty: 1 year
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Tweeter Design 1" Dome
Tweeter Composition Kortec
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity 90 dB
Frequency Response 8000 - 22k Hz
High-Pass Crossover Frequency ---
RMS Power Range (Watts) 2-40
Peak Power Handling (Watts) 100
Impedance (Ohms) 8
Top-mount Depth (Inches) 1
Cutout Diameter or Length (inches) 1 3/4
Product Research
What's in the box?

Download owner's manual

  • 2 Tweeters
  • 2 Crossovers
  • 2 Flush-mount cups
  • 2 Surface-mount cups
  • 2 Angle-mount bases
  • Two lengths of 5' speaker wire (with male quick-slides on one end and female quick-slides on other end)
  • Eight 1" self-tapping screws
  • Four 1/2" self-tapping screws
  • 4 Metal clamps
  • Hex-key
  • Instructions/Specifications
  • Product Registration Card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.



Overview: The Boston Acoustics IS Type-S (ISTS) Imaging System contains two 1" tweeters, two passive crossovers, speaker wire, and mounting hardware. The Boston Acoustics ISTS optimizes the soundstage height in your vehicle and easily incorporates into any existing car audio system.

1" Tweeters: The tweeters feature 1" Type S-1 Kortec domes for smooth high frequency response and linearity. Kortec is a specially engineered material with the rigidity of a composite dome and the smoothness and detailed response of cloth.

Mounting Cups: The supplied Quick-fit mounting cups simplify tweeter installation. The tweeters come with flush, surface, and angle mount brackets.

Passive Crossovers: On each tweeter crossover, you can adjust the tweeter output by -3, -6, or -9 dB. The crossover's top-cover is removable to adjust tweeter output and to make speaker connections. A small philips-head screwdriver is required to connect the included speaker wire to the crossovers.

Speaker Wire: The Boston Acoustics ISTS includes two 5' lengths of speaker wire to attach the tweeters to the crossovers. The speaker wire features male and female quick-slide connectors.


Tweeter Dimensions: The tweeter features the following dimensions when using the surface, flush, and angle mount brackets, or bottom mounting the tweeter.

Tweeter Dimensions Frame Diameter Cutout Diameter Mounting Height Mounting Depth
Bottom 1.595" 1.595" 0" 0.975"
Flush Mount 2.035" 1.735" 0.4375" 0.8125"
Surface Mount 1.875" 1.745" 1.065" 1.0" (screw depth)
Angled Surface Mount 1.875" Screw holes only (0.8125" apart) 1.5" 0.9375" (screw depth)

Crossover Dimensions: Each crossover has the following dimensions.

  • Width = 6.875"
  • Height = 1.4375"
  • Depth = 1.6875"
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Boston Acoustics ISTS Reviews

Average Customer Review:

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Filter by rating:
5 out of 5

look good sound good

Written By JEZ, Newville, PA. on Friday, March 22, 2013
Crutchfield Customer Review (What's this?)
They deliver nice crisp highs. The speakers in the doors have tweeters. But these speakers have a better sound, or its because they are mounted up at the top of the door panel, just inside the rear view mirrors, and they are more directional. Whatever it is, it improved the over all sound of my stereo. They came with a verity of mounting options, and they should be able to be mounted into any vehicle without too many problems.
Sound good, good insulation options, look nice
I used the mounting base that lets the speakers be mounted on an angel. The speaker wires that came with the speakers had terminal ends that when installed onto the sparkers upper base, would not fit inside the mounting lower/angel base. I had to cut the terminals off the speaker wires and solder the wires right to the speaker mount. But the mount had holes in the terminals that were made for that purpose. If you know how to solder its not a big deal.
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5 out of 5

Sounds very good!

Written By Marc D, Brevard County, FL on Monday, January 23, 2012
These tweeters sound good, and out of the box, they were impressive (solid, heavy feel, nicely packaged). I am sending them approximately 35 watts from an arc audio 125.2 mini amp, and they do not disappoint me. I have them set at -3db on the crossovers, and they are not too harsh (95 percent of the time) and really bring the front soundstage to life. I would definitely buy these again. Well worth the price!
Sounds Good. Really lifts my soundstage from being mounted in the corners of the front dash.
They are 8 ohms, so be careful when designing your system.
5 out of 5 people found this helpful
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Add accessories for the Boston Acoustics ISTS

You may need speaker wire to get the signal to your tweeters. It's sold by the foot, so enter the amount you'll need when you get to your cart. See all categories & accessories

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For a more in-depth review and enhanced detailed information on the Boston Acoustics ISTS, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_065ISTS/Boston-Acoustics-ISTS.html ).