Markie Warkie
Member
"Warning ⚠ English is not my 1st Language AND I tend to be very OCD and verbose when writing.
Before I continue, after listening to a variety of speakers at my local audio shops, ranging from 1000 to 12000 euros, I have not yet found something that fully satisfies me. Out of all the speakers I heard, the Klipsch Forte 4s left an impression because I liked how 'fast' they sounded (transient response), they had a very interesting sound; however, they lacked bass (and had other weird characteristics). I could elaborate on this all day, but here's the TL;DR:
I want to design and build a 2 or 3-way speaker for both music and home theatre use (I know, pretty different applications). My room is 32m2 with a 3M tall ceiling (4.9m x 6.4m x 3m). I want to keep driver and crossover costs at a budget level, around 500~ euros per speaker, or around 1000 euros for a pair, not including cabinet costs.
After hours of obsessing and reading online, including a book I had at home about loudspeaker design, I came to a few design decisions:
1. MTM? (not 100% sure if needed in my case)
2. Closed OR passive radiator midsection
3. Passive radiator bass/sub 'tower'?
4. Analog Crossover (DSP is out of budget)
5. Good vertical and horizontal directivity
6. Fast transient response
7. Possibility for future Expansion (bass module?)
I chose the drivers below based on their characteristics, as well as simulations in Vituix Cad (although I'm not 100% sure about my accuracy), and insights from other people's posts and builds online, and in magazines like Klang+ton.
- Tweeter: SEAS Prestige 27TBCD/GB-DXT - H1499-06 (€99.95) x1
- Midrange/Woofer: SB Acoustics SB15NBAC30-8 (€79.95) x2
- Passive Radiator: SB Acoustics SB15SFCR-00 (€32.95) x2
The reasoning behind driver choice:
- I chose the DXT because I saw how well it performed in the R1 Directiva as well as DXT mon, DXT wave, and others, as well as tests by Heissmann Acoustics.
- The two SB15s have a nice flat response in a passive radiation enclosure that would make it easier to blend with the tweeter at a 2nd order crossover of 1.8KHz, as well as being a good budget driver.
- The two SB15FCRs should have enough surface area to dissipate the energy of the two 'mids,' as well as allow the group delay not to skyrocket.
Shortcomings/issues in my Thought:
- I'm trying to design a speaker and crossover without:
- Full FRD+ZMA files as well as directivity measurements.
- The actual response of the drivers with the baffle I designed and the box, so I know how to design the crossover.
- Am I expecting too much?
- No actual experience in the field of designing speakers aside from setting up and listening.
- Pretty low budget considering Directiva was 500 just for a woofer.
- Hyper obsessing on the project made me unsure about my decisions (ADHD + Autism is a pain).
Compromises willing to be made:
- Driver choices Mid/Woofer/PR
- Size, they could be big or small. WAF is not an issue.
- Low-end response, a 2-way with 2x5-inch can only do so much without extra reinforcement.
What are you asking from US? You might be asking:
- Help me with:
- Driver integration/Box
- Teach me new stuff because it's 100% inevitable that I'm gonna learn A LOT of new stuff from this post (thankfully)
- Crossover Design
- Baffle Size/Simulation
- Baffle Step
- Time Alignment T+M OR T+M+Future Basstower Or T+M+W
Inspirations for the project:
- DXT-Wave (Heissmann Acoustics)
- DXT-MON (Heissmann Acoustics)
- Directiva R1 (ASR + Rick Sykora)
- Nebular Monitor (Tony Gee humblehomemadehifi)
- NeXT-Monitor (Klang&ton)
- 8c (Dutch& Dutch)
- A700+A400 (Buchardt)
Thanks for taking the time to read my post. <3
Before I continue, after listening to a variety of speakers at my local audio shops, ranging from 1000 to 12000 euros, I have not yet found something that fully satisfies me. Out of all the speakers I heard, the Klipsch Forte 4s left an impression because I liked how 'fast' they sounded (transient response), they had a very interesting sound; however, they lacked bass (and had other weird characteristics). I could elaborate on this all day, but here's the TL;DR:
I want to design and build a 2 or 3-way speaker for both music and home theatre use (I know, pretty different applications). My room is 32m2 with a 3M tall ceiling (4.9m x 6.4m x 3m). I want to keep driver and crossover costs at a budget level, around 500~ euros per speaker, or around 1000 euros for a pair, not including cabinet costs.
After hours of obsessing and reading online, including a book I had at home about loudspeaker design, I came to a few design decisions:
1. MTM? (not 100% sure if needed in my case)
2. Closed OR passive radiator midsection
3. Passive radiator bass/sub 'tower'?
4. Analog Crossover (DSP is out of budget)
5. Good vertical and horizontal directivity
6. Fast transient response
7. Possibility for future Expansion (bass module?)
I chose the drivers below based on their characteristics, as well as simulations in Vituix Cad (although I'm not 100% sure about my accuracy), and insights from other people's posts and builds online, and in magazines like Klang+ton.
- Tweeter: SEAS Prestige 27TBCD/GB-DXT - H1499-06 (€99.95) x1
- Midrange/Woofer: SB Acoustics SB15NBAC30-8 (€79.95) x2
- Passive Radiator: SB Acoustics SB15SFCR-00 (€32.95) x2
The reasoning behind driver choice:
- I chose the DXT because I saw how well it performed in the R1 Directiva as well as DXT mon, DXT wave, and others, as well as tests by Heissmann Acoustics.
- The two SB15s have a nice flat response in a passive radiation enclosure that would make it easier to blend with the tweeter at a 2nd order crossover of 1.8KHz, as well as being a good budget driver.
- The two SB15FCRs should have enough surface area to dissipate the energy of the two 'mids,' as well as allow the group delay not to skyrocket.
Shortcomings/issues in my Thought:
- I'm trying to design a speaker and crossover without:
- Full FRD+ZMA files as well as directivity measurements.
- The actual response of the drivers with the baffle I designed and the box, so I know how to design the crossover.
- Am I expecting too much?
- No actual experience in the field of designing speakers aside from setting up and listening.
- Pretty low budget considering Directiva was 500 just for a woofer.
- Hyper obsessing on the project made me unsure about my decisions (ADHD + Autism is a pain).
Compromises willing to be made:
- Driver choices Mid/Woofer/PR
- Size, they could be big or small. WAF is not an issue.
- Low-end response, a 2-way with 2x5-inch can only do so much without extra reinforcement.
What are you asking from US? You might be asking:
- Help me with:
- Driver integration/Box
- Teach me new stuff because it's 100% inevitable that I'm gonna learn A LOT of new stuff from this post (thankfully)
- Crossover Design
- Baffle Size/Simulation
- Baffle Step
- Time Alignment T+M OR T+M+Future Basstower Or T+M+W
Inspirations for the project:
- DXT-Wave (Heissmann Acoustics)
- DXT-MON (Heissmann Acoustics)
- Directiva R1 (ASR + Rick Sykora)
- Nebular Monitor (Tony Gee humblehomemadehifi)
- NeXT-Monitor (Klang&ton)
- 8c (Dutch& Dutch)
- A700+A400 (Buchardt)
Thanks for taking the time to read my post. <3
