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I am not much for spending money on something that I think might or could improve my audio setup. Things like super high priced audio cables and speaker wires that cost more than my Onix Reference 3’s alone (over 3g). I like adding bigger speakers and power amps which provide an up front in your face difference. You know, improvments that add up quick to a big difference in sound and performance.

I do use and recommend one item though that has changed my thinking on this a little. Its not snake oil and it does work, though it is hard to describe in words the effect this add on can create with your existing speakers. The ERT (Extended Range Tweeter) by av123 si the little unit I am talking about.

The Onix Reference 3’s come with these incorporated and built into the speaker. Before I had the ref 3’s though I had a pair of Rocket 760’s with a Bigfoot (RSC200) center channel all of these came with a tweeter of course (Vifa Ring) but not an ERT. So I purchased three of the ERT’s one for each speaker up front. I didn’t notice much at first, but as I listened to more music and movies the difference with and without became apparent. yes I did do switch outs to see if the differences were real or not and they were. Not a big change but a welcome one at any rate.

Its not like running with and without a tweeter, though you can hear the ERT, but more like a play on the senses. The ERT goes above and beyond what the human ear can hear, but it creates a more open and revealing top end, a complement to your existing tweeter. I did notice them during a scene in a movie, I cant remember which one, where bats came flying out of a cave.Humans can only hear sound up to about 16KHz (that’s 16,000 cycles per second). Bats emit sounds at typically 2 or 3 times higher pitch than we can hear, but with the ERT’s in the mix re creating that ultra sonic sound, it sounded like those nasty little suckers were right there and flying all around chirping.

ERT specs:

Driver: Magnetostatic Super Tweeter
Frequency Response: 8KHz – 45KHz (+/- 3dB)
Crossover Points: 11KHz & 15KHz
Gain: Stepped attenuator for controlling output. Four available output levels: 92dB, 90.5dB, 89dB and 87.5dB @ 1w/1M
Connection: Includes one pair of 5 foot (1.52M) one crystal OFC wires for connecting to your speaker’s binding posts
Impedance: 4 ohms
Sensitivity: 92dB (@ 1 Watt / 1 Meter). Each pair of Onix ERT’s are precisely measured for mutually matched sensitivity.
Dimensions: (WxDxH) 12.0 x 13.0 x 12.8 cm
Weight: 2.0 Kgs / pair

Related:

• Onix Rocket 760’s
• Aperion Intimus 633-T Tower Speakers
• Aperion 634-VAC Heavy hitter Center Channel
• Onix Reference 100 Cnenter Channel
• KEF IQ3 Book Shelf Speaker
• New addition to Speaker Line Up KEF IQ3 and IQ7 Pictures Included
• Rocket RS 250 MKII and the Omni Mount WB 30
• ONIX REFERRENCE .5 BOOK SHELF SPEAKER
• RSC200 BIGFOOT WITH THE NEWLY DESIGNED CROSS OVER
• JUST GOT THE ROCKET 450S IN DA HOUSE!! THE RIGHT AND LEFT HAND OF BIGFOOT.

Tags: Speakers //