LITTLE SHOP OF TWEETERS
DON'T FREAK OUT - THIS CHART IS A WORK IN PROGRESS
I'M COMPARING FK/WBFK OFFERINGS AND THIS IS THE EASIEST WAY TO LAY OUT THE CHOICES
Let me state my preferences up front. Here's what I look for in a dedicated tweeter:
1)
HF Extension: How far does this driver go before it peters out? Even if the lower treble is more important than the top end, wider extension adds presence and sizzle.
2)
Frequency Centerpoint: Ideally, I'd like that first spike to be as far from the midrange as possible. I can get midrange from another driver. All things being equal, an early spike portends weaker HF extension.
3)
A Milder Spike: It's easy to place a higher value on a stronger spike because it represents louder highs, but a spike is an imbalance. A little goes a long way. I want HF representation, not distorted highs that go through my head like a sharp needle.
Given the value and coolness factor of the TWFK, any FK or WBFK driver worth considering needs to at least have the same quality of HF extension as the TWFK dual, which has the following data:
http://www.knowles.com/search/prods_...-30017-000.pdf
HF Extension: 73dB at 10kHz
1st Peak: 2.9kHz (103dB)
2nd Peak: 6kHz (97dB)
FK-23451 ($38 - Digikey/$40 - Mouser nonstocked) (630 ohm)(107dB)
http://www.knowles.com/search/prods_...-23451-000.pdf
HF Extension: 80dB at 9kHz
1st Peak - 2.5kHz (108dB)
2nd Peak - 6kHz (100dB)
FK-23989 ($45.54 - Mouser, min. 12 nonstocked)(145 ohm)(95dB)
http://www.knowles.com/search/prods_...-23989-000.pdf
HF Extension: 70dB at 9kHz
1st Peak - 2.7kHz (102dB)
2nd Peak - 6.3kHz (87dB)
FK-26260 ($40.19 - Mouser, min. 13 nonstocked)
http://www.knowles.com/search/prods_...-26260-000.pdf
HF Extension: 80dB at 9kHz
1st Peak - 2.5 kHz (105dB)
2nd Peak -5.7 kHz (97dB)
FK-6260 ($33/Digikey, min. 28, non-stock) (135 ohm)
no datasheet
FK-23466($37 - Digikey, min. 25, non-stock/$45.54 - Mouser, min. 12 nonstocked) (630 ohm)(107dB)
http://www.knowles.com/search/prods_...-23466-000.pdf
HF Extension: 80dB at 9kHz
1st Peak - 2.5kHz (108dB)
2nd Peak - 6kHz (100dB)
FK-26433 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26433-000.pdf
HF Extension: 80dB at just shy of 9kHz
1st Peak - 2.5kHz (107dB)
2nd Peak - 5.7kHz (97dB)
FK-26746 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26746-000.pdf
HF Extension: 70dB at 9kHz
1st Peak - 2.7kHz (103dB)
2nd Peak - 6.4 kHz (87dB)
FK-26768 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26768-000.pdf
HF Extension: 77dB at 10kHz
1st Peak - 2.5kHz (109dB)
2nd Peak -6.4kHz (97dB)
FK-26777 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26777-000.pdf
HF Extension: 80dB at 8kHz
1st Peak - 2.4kHz (108dB)
2nd Peak - 6kHz (92dB)
FK-26816 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26816-000.pdf
HF Extension: 70dB at 9kHz
1st Peak - 2.7kHz (100dB)
2nd Peak - 5.5kHz (85dB)
FK-26837 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26837-000.pdf
HF Extension: 70dB at 9kHz
1st Peak - 2.7kHz (103dB)
2nd Peak -6.4kHz (87dB)
FK-26888 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26888-000.pdf
HF Extension: 70dB at 8kHz
1st Peak - 2.9kHz (101dB)
2nd Peak - 6kHz (88dB)
FK-26889 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-26889-000.pdf
HF Extension: 70dB at 8kHz
1st Peak - 2.8kHz (101dB)
2nd Peak -6kHz (88dB)
FK-30020 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-30020-000.pdf
HF Extension: 70dB at 9kHz
1st Peak - 2.7kHz (102dB)
2nd Peak -6.2kHz (87dB)
FK-30030 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-30030-000.pdf
HF Extension: 70dB at 9kHz
1st Peak - 2.7kHz (103dB)
2nd Peak -6.2kHz (87dB)
FK-30040 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-30040-000.pdf
HF Extension: 70dB at 8kHz
1st Peak - 2.8kHz (99dB)
2nd Peak -6.5kHz (81dB)
WBFK-23990 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-23990-000.pdf
HF Extension: 77dB at 10kHz
1st Peak - 4kHz (104dB)
2nd Peak -7kHz (97dB)
WBFK-30000 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-30000-000.pdf
HF Extension: 73dB at 10kHz
1st Peak - 3.3kHz (103dB)
2nd Peak -6.4kHz (97dB)
WBFK-30019 ($40.19 - Mouser)
http://www.knowles.com/search/prods_...-30019-000.pdf
HF Extension: 77dB at 10kHz
1st Peak - 4.1kHz (103dB)
2nd Peak -7.1kHz (96dB)
WBFK-30042 ($45.54 - Mouser, min. 12 nonstocked)
http://www.knowles.com/search/prods_...-30042-000.pdf
HF Extension: 73dB at 10kHz
1st Peak - 3.4kHz (104dB)
2nd Peak -6.6kHz (95dB)
WBFK-30095 ($40.19 - Mouser)
http://www.knowles.com/search/prods_...-30095-000.pdf
HF Extension: 80dB at 8kHz
1st Peak - 3.4kHz (106dB)
2nd Peak -5.4kHz (103dB)