HAL-O III brings out the best potential in extremely hot-running audio rectifier, power tubes and other sensitive vacuum tubes. HAL‑O III subdues heater-generated vibrations and common microphonics, allowing a truer rectified current and truer amplified signal. A less-fuzzy, cleaner rectified current will typically cause other audio tubes in a component to render the music more clearly. Tube output will be more musical, more energetic and less vague, while maintaining your system's unique nature and character.
With spring-tempered titanium C-ring and annealed titanium isolation pads, HAL‑O III is appropriate for all vacuum tubes, ideal for extremely hot-running tubes, able to handle continuous tube heat in excess of 1000° F (538° C).
HAL-O III-7: For 7-pin miniature tubes and all tubes approximately 5/8" to 3/4" diameter (16mm to 19mm), including 0A2, 0B2, 0C2, 1S5, 12AE6, 12FK6, 12FM6, 12X4, 304B, 3A5, 3S4, 403A/B, 408A, 5591, 5651, 5654, 5654SQ/W, 6005, 60FX5, 6186, 6AK5, 6AK5W, 6AL5, 6AN4, 6AQ5, 6AQ6, 6AU6, 6BH6, 6C4, 6ER5, 6FG5, 6FQ5A, 6FS5, 6FY5, 6GK5, 6J1, 6J1P, 6J1P-EV, 6J6, 6N4, 6P17, 6X4, 6Z4, 7543, 9001, DCC90, DL92, EC90, EF95, M8100, OA2, OB2, OC2, SBA6. (Most 7-pin miniature tubes, at about 19mm diameter [3/4"], can also use size 9.)
HAL-O III-9: Fits miniature 9-pin tubes and all tubes 3/4" to 7/8" diameter (19mm to 22mm), including 10GV8, 12AT7/ECC81, 12AU7/ECC82, 12AX7/ECC83, 12AY7, 12AZ7, 12B4, 12BH7, 12BY7, 12BZ7, 12DW7, 12FQ7, 2C51, 396, 396A, 417, 5670, 5687, 5751, 5755, 5814, 5842, 5879, 5963, 5965, 6072, 6189, 6201, 6267, 6350, 6385, 6414, 6519P, 6688, 6829, 6840, 6900, 6922, 6955, 6973, 6AN8, 6BL8, 6BM8/ECL82, 6BQ5/EL84, 6BQ7, 6BZ7, 6BW4, 6C19P, 6CA4, 6C45, 6CG7, 6CS7, 6DE7, 6DJ8/ECC88, 6E5P/6E5PI, 6EJ7, 6EU7, 6FQ7, 6GC7, 6GF7A, 6GH8(A), 6GU7, 6GW8, 6H23N, 6H30, 6H6PI, 6N1P, 6N2P, 6N30, 6N30P, 6N3P, 6N6P, 6P1, 6P1P, 6P1P-EV/6II1II-EB, 6S19P, 6S4, 6U8(A), 6V4, 7025, 7044, 7058, 7062, 7119/E182CC, 7189, 7199, 7308, 7788, 7AU7, 7DJ8, 8416, CCa, D3a, E288CC, E80CC, E80F, E88CC, EC86, ECC189, ECC802S, ECC803/S, ECC81, ECC82, ECC83, ECC85, ECC86, ECC99, ECF80, ECL86, EF184, EF800, EF86, EL821, EL84, EL86, EM84, EZ80, EZ81, M8162, PCC88, PCL82, PCL86, SV83, (T-6 1/2 bulb).
HAL-O III-25: Fits all tubes approximately 1" to 1-1/16" diameter (23mm to 28mm), including metal 12SC7, metal 12SJ7, 5693, "slim" 5Z4, "slim" 6AU4, metal shell 6F6, 6J5, 6R7, metal 6SC7, metal 6SJ7, "slim" 6SN7, metal 6V6, 6X5.*
HAL-O III-30: Fits narrow, straight-sided octal tubes and all tubes approximately 1-1/8" to 1-1/4" diameter (28mm to 32mm), including 0A3A (straight-sided), 1266, 12AX3, 12J5/GT, glass 12SJ7, 12SJ7GT, 12SL7/GT, 12SN7/GT, 3CM, 437A, 4P1L, 5691, 5692, 5852, "slim" 5AR4 (G.E., Sovtek/Reflektor, T-9 bulb), 5Y3, 5Y3GA, 5Y3GT, "wide" 5Z4, 6106, 68HC, 6AH4, 6AU4GT, 6AU4GTA, 6AU5, 6AX4GT, 6AX4GTA, 6AX4GTB, 6BL7, 6C5S, 6CJ3, 6D22S, 6DA4/6DA4A, 6DN7, 6EA7, 6EM6, 6EM7, 6EW7, straight-sided 6F6G, 6FD7, 6FY7, 6H4GT, 6J8P, 6K11, "slim" 6L6, 6N8P, 6N9P, 6R7GT (glass T-9 bulb), 6SF5-GT (glass tube), 6FM7, 6SC7 (glass tube), 6SH7, glass 6SJ7, 6SJ7GT, 6SL7, 6SN7, 6SN7GT-series (6SN7GT, 6SN7GTA, 6SN7GTB, 6SN7WGT, 6SN7WGTA), 6V6, 6V6GT (GE, Sylvania, Tung-Sol), 6X5G/GT/WGT, 6Y6, 7355, 7591, 7868, 7N7, C3G, C3M, EC8020, "narrow" EL34 (E-H, Mullard, SED "Winged C," Siemens, Svetlana, Telefunken, NOS Tesla, Tung-Sol), EL34/6CA7 (Svetlana), EL34B (Tung-Sol), GZ30, GZ34 (Gold Lion), MT8 bulb, OA3A (straight-sided), PL504, T-9 bulb, VT-231.*
HAL-O III-35: Fits standard, straight-sided octals and all tubes approximately 1-1/4" to 1-7/16" diameter (32mm to 36mm), including 5AR4 (Amperex, G.E., Japanese "Mullard" copy, Mullard, JJ, Shuguang), "slim" 6CA7 (Tung-Sol), 6H6, standard 6L6/5881, 6L6B, 6L6GT, 6L6WGB, 6SF5 (metal shell), 6V6GT (RCA), 6V6S (JJ), E34LS, ECC33, medium-diameter EL34 (Amperex, Philips, JJ, some Mullards, Valvo), EL34B (Shuguang), GZ34 (GE, JJ, Mullard, Philips, Raytheon, RCA), KT77.*
HAL-O III-40: Fits wide and bottle-shaped octals and all tubes approximately 1-1/2" to 1-5/8" diameter (37mm to 43mm), including 0A3 (bulb-shape), 0C3, 0D3, 1626, 19, 27, 30, 37, 3DG4, 520B (near bottom of tube), 5881, "fat-bottle" 5AR4 (Amperex, Mullard, T-11 bulb), 5AW4, straight-sided 5R4-types, straight-sided 5U4 and 5U4-GB (T-12 bulb), 5V3, 5V4, 5Y3GB, 5Y4GA, 5Z4G, 5Z4P, 6080, "slim" 6550, straight-sided 6AS7, 6BY5/G/GA (straight-sided), 6C6, 6C8G, "Big Bottle" or Fat Bottle 6CA7 (E-H, Sylvania, GE, etc.), "Black Bottle" 6CA7-Z, 6F8G, 6HB5, bottle-shape 6J5 (ST-12 bulb), 6JN6, 6L6GC (E-H, Mazda, JJ, GE, RCA, Sylvania, Tungsol), 6L6WGC, 6LF6, 6P3P, Sophia Electric "bottle" 6SL7 and 6SN7, 7027/A, 7236, 76, 84, 8417, 85, CV3798, "Fat Bottle" EL34 (Big Bottle), EL509, G75/2D, straight-sided GZ32, "slim bottle" GZ37, KT90, OA3 (bulb-shape), OC3, OD3, PL509, QS150/40, QS75/40, VR105, VR75/40.*
HAL-O III-50: For all tubes approximately 1-3/4" to 2" diameter (44mm to 50mm), including 10Y, 101F, 1610, 2A3 (Brimar, E-H, E-H Gold, RCA, Sovtek, Sylvania, Tung-Sol), 26, 274B (Western Electric), 307A, 35, 350B, 3A/110A, 3A/110B, 3D21A, 421A, 422A, 45 (RCA, Sylvania, TJ, Tung-Sol), 46 bottle-shape, 572-10, 5998, bulb-shaped 5R4-types, 5R4WGA/B (Tung-Sol), bottle-shape 5U4G, 5V4, 5Y3G (Sylvania), 5Z3, 5Z3P/A, 5Z4G (Brimar), standard and wide 6550 (E-H, GE, Philips, RCA, SED, Svetlana, Sylvania, Tung Sol), 6550A, 6550C, bulb-shape 6AS7, 6AS7G, 6B4, 6B4G, 6BY5/G/GA (bottle-shape), 6CA7-Z, 6C33C (upper portion of tube), bulb-shape 6F6G, 6H13, 6H13C, bulb-shape 6L6G, 6N13P, 6Y6G, 71A, 80 bottle-shape, 801/801A, 807, straight-sided 811, 814, C327 ("bulb" 27), CX4, bottle-shaped octals like AZ4, CV181/ECC32, CV181TII (Psvane 6SN7), CV181-Z (Shuguang), CV378 (Mullard), EL156, EL37, ER300b (Elrog 300b), bottle-shaped GZ32 (Mullard), GZ33, KT120, KT66, KT88 (E-H, EAT, GEC, Gold Lion/Genalex, JJ/Tesla, SED, Shuguang, Sovtek, Svetlana), PX4, ST-14 bulb, ST-16 bulb, U52.*
HAL-O III-55: For jumbo-size tubes 2-1/16" to 2-5/16" diameter (51mm to 59mm), including 101D/101F, narrow 211 (RCA), 211/VT-4C (GE), 2A3 (EML), 2A3-Mesh (EML), 274A, 300B "Balloon" (KR), Svetlana 300B, Takatsuki TA-300B, 45 (EML), 46 globe-shape, large bottle 5Y3GB (smaller Mazda uses size 40), 80 globe-shape, "narrow" 805 (RCA, United), 829B, 841, 842, narrow 845 (Amperex, RCA), 845A (Shuguang), 872, GE211, "Big Bottle" GZ37, KT150 (specify size "60" in comments section of order form), SV811-10, ST-17 bulb, T-18 bulb.*
HAL-O III-65: With plenty of flex to accomodate a wide range of tube diameters, fits giant tubes from 2-3/8" to 3" diameter (60mm to 76mm), including 101D "tennis ball," 101J, 102B, wide 211 (Sophia, TJ), 274B (EML, Shuguang, Sophia, Valve Art), 2A3-40W (JJ), 2A3 Meshplate (Sophia, TJ), 2A3 Globe Meshplate (Sophia, TJ), 2A3C (Shuguang), 300B (AVVT, E-H, EML, JJ/Tesla, Sovtek, KR, TJ/Full Music, Western Electric), 300B-XLS (EML, KR), Meshplate 300B (EML, Golden Dragon, TJ, Sophia, Shuguang, Valve Art), 300B Globe Meshplate (Sophia, TJ), 32B, Globe 45 (TJ/Full Music/Sophia), 45C, 45N, EML 45-mesh, 50, 520B, EML 5U4G-Mesh & 5Z3-Mesh, 6C33C (wide portion of tube), 803, "wide" 805 (Amperex, Shuguang, TJ), 811A, 813, wide 845 (Sophia, Shuguang metal plate, TJ), 845B (Shuguang), F2A, GM70, PX25, ST-18 bulb, ST-19 bulb, T-20 bulb.*
HAL-O III-100: With extra-heavy-gauge stainless steel C-ring and pure titanium isolation pads, HAL-O III-100 thoroughly tames microphonics in super-giant tubes 3-1/2" to 4-5/8" diameter (89mm to 118mm), including 833, KR T-1610 (Kronzilla), and tubes using T-36 bulb.
- Reviews
- Questions
United KingdomHAL-O III Stabilizer (Brass version)
This is my 3rd set use in the system and this stabliizer is so good. I live in UK and I am happy to pay extra postage cost to get them.
United StatesTitanium tube dampeners
I have used your products in the past, always with great satisfaction! The titanium tube dampeners have improved the sound of my system in so many ways (more extended highs, tighter bass, etc.) Thank you so much! Gary
United StatesGreat fit, solid build quality
I recently purchased a used tube-powered phono preamplifier and noticed that one side was noisier than the other at high-than-normal listening levels (with no record playing). I removed and re-seated all the tubes and the noise floor dropped. On advice of a friend, I also ordered the HAL-O III Stabilizers and some De-OxIT Gold. Once both arrived, I removed the tubes again, cleaned each pin thoroughly with De-OxIT to and re-seated each tube carefully, then slid the Stabilizers around each one according to the instructions. The noise floor dropped yet again, this time allowing me to turn up the volume several more percent on my McIntosh C47 before any noise could be heard at the listening position, and there is less asymmetry in the noise heard (the left channel used to be very pronounced, now it's barely audible, and the right side went from quiet to nearly silent at obscene volume levels. I also noticed the tubes are markedly less resonant when tapped, which I suppose is the entire point of the Stabilizer. Thanks, Herbie!
ThailandHal-OIII
It's a great pleasure to be able to listen to my music with the Hal-0III dumpers. I'm going to order more for my big hits. I highly recommend this product.
United StatesProducts from this website are truly the BEST !!!!!
Purchasing items from this website has been game-changing. All the items that I have purchased speak for themselves. I am glad I made the purchases. I will buy from this company always in the future.
NetherlandsHal-o3 stabilizer
Great product. More realistic sound. Better holographics. Use them on my sophia electric 12au7. Amp is a prima luna evo 400i.
United States10 Stars? YES!
10 stars possible? Really quite surprising how much of an improvement over my beloved RX dampers I have on all 26 tubes in my system. I have been using the RX now for many years successfully on every tube type I have tried them on. I recently had to replace my RX for my preamp power tubes due to a different size and decided to try the Halo-III. Wow, what a difference these make. Now, I am having to consider upgrading all my other RX to the Halo-III's when I can. These are simply sublime. A must-try product. Well done, Robert!
United StatesLamm Ref Power supply tubes.
Worked like a charm. More info, better transparency. But them.
United StatesNice products
Herbie's tube instruments were recommended by multiple members in my hobby groups/circles over a few months. When I ran into some power tubes that had a ringing issue, I decided it was time to give some type of tube dampening a try. I researched a few and kept coming back to Herbie's website. I liked the concept and no-BS manner in which his products are presented. No outlandish claims to convince you that they are worth more, just what it is, what it's made of, what it does, and the price. So far I have tried to the middle-grade tube instruments in multiple sizes and the Premium tube instruments in one size. They have served their purpose well. If you need devices like this for your amp and you want something that looks professional and works better than it needs to, give them a try. In this case, you get what you pay for. I have my eye on one of his turntable mats next. Happy listening!
United StatesREMEDY FOR MICROPHONIC TUBES
So far the HAL-O 111 stabilizer have improved 6H30, 7308 and 6X4A vacuum tubes. Excellent product.
United StatesGreat Products, Great Customer Service!
fast fair friendly transaction! great communication, items were exactly as pictured, quickly shipped at low cost and sound great in multiple A/B listening tests. i would highly recommend and happily use this vendor and their products again!
United StatesFocus Focus Focus
The overall effect these Hal-o tube dampeners have on my Luxman sq-n100 amp is greater focus. Absolutely more clarity to snare drums and better definition to the high-hat. Bass is now almost too much with this 12 watt amp that power my Tekton Design Perfect Set speakers. Outstanding product!
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